Low blood pressure, also known as hypotension, is usually considered a sign of good health and low risk for cardiovascular disease. However, there are times when persistently low blood pressure or a sudden drop can be a sign of an underlying health issue that needs medical attention. Knowing when low blood pressure becomes a problem can help ensure timely intervention and proper care.

Blood pressure readings consist of two numbers:

Systolic pressure (the top number) indicates the pressure in your arteries when your heart pumps blood. Diastolic pressure (the bottom number) reflects the pressure in your arteries while your heart is resting between beats.

The normal reading is usually 120/80 mmHg or less. Hypotension is clinically defined as having blood pressure readings less than 90/60 mmHg. In some patients, low blood pressure will have no adverse health consequences and therefore does not need to be treated. In extreme cases, however, it can limit the flow of oxygen and nutrients to vital organs, resulting in potentially life-threatening complications, such as shock.

Causes of Low Blood Pressure

Hypotension can result from many factors. Some of the factors that cause hypotension are as follows:

• Insufficient fluid intake or excessive fluid loss can lead to decreased blood volume and hence hypotension.
• An injury or internal bleeding may result in hypotension. This happens because blood pressure becomes significantly reduced.
• Some hormonal changes along with the increased blood requirement during pregnancy also causes hypotension.
• Issues like heart failure or arrhythmias can impair blood circulation and result in low blood pressure.
• Certain drugs, including diuretics, antidepressants, and blood-pressure-lowering medications, can induce hypotension.

Symptoms of Hypotension

While low blood pressure may not always cause symptoms, it can sometimes be associated with:

- Dizziness or fainting

- Fatigue and weakness

- Blurred vision

- Nausea

- Confusion or difficulty concentrating

- Shallow breathing

- Palpitations

If the person experiences these symptoms, with the recorded blood pressure reading, the medical services have to be consulted.

Types of Low Blood Pressure

1. Orthostatic Hypotension: This is a kind of hypotension that appears as a result of decreased blood pressure when a person is standing up from lying down or sitting position and primarily affects elderly people.

2. Postprandial Hypotension: This is a drop in blood pressure after eating, more common in older people.

3. Neurally Mediated Hypotension: It is triggered by standing for long periods. This type can affect younger people and is associated with miscommunication between the brain and heart.

When Is Low Blood Pressure Dangerous?

There is no such thing as a universal threshold for very low blood pressure, but a blood pressure reading below 90/60 mmHg can be dangerous and require prompt medical assessment if accompanied by symptoms of fainting, confusion, or shortness of breath. Sudden falls in blood pressure may point to potentially serious underlying causes, which can include:

• Internal bleeding
• Sepsis (severe infection)
• Allergic reactions

Management and Treatment

Treatment of hypotension depends on its cause:

• Hydration Drinking more water can help against dehydration-related hypotension.
• Compression Stockings: These can improve circulation and reduce blood pooling in the lower limbs.
• Dietary Changes: Increasing salt intake under supervision can help increase blood pressure
• Medication Changes: The physician may need to reduce dosages of some medications or replace prescriptions.

For more severe cases, physicians might also administer fludrocortisone or midodrine to increase blood pressure. Shock from hypotension should be treated promptly to ensure proper function of organs.

Can Hypotension Cause Fatigue?

Chronic fatigue syndrome has also been associated with low blood pressure. Prolonged tiredness, despite adequate rest, may require reassessment of blood pressure levels. Fatigue secondary to hypotension will impact functionality and thus requires assessment and treatment of the cause.

When to Seek Medical Care

If your blood pressure readings are low consistently and without symptoms, you probably have nothing to worry about. If you do have symptoms like dizziness, fainting, or confusion, you need to go to the doctor. Blood pressure checks are usually conducted regularly. Once you are aware of your own normal baseline, you will know right away when there is something wrong.

Lifestyle Tips That Support Normal Blood Pressure

1. Other than directly treating hypotension, a healthy lifestyle overall would promote balanced blood pressure levels.
2. Exercise regularly; it promotes cardiovascular health and can help regulate blood pressure.
3. Focus on nutrient-dense foods rich in iron, B vitamins, and electrolytes to support circulatory health.
4. Excessive alcohol consumption dehydrates the body and lowers blood pressure.
5. Practices like yoga and meditation can help maintain a healthy blood pressure range.

Delhi's air quality index (AQI) remained in the 'very poor' category on Wednesday, as the city's average AQI stood at 329 as of 7am. The Central Pollution Control Board (CPCB) data in all stations, though, showed that it was below the 'severe' range, with some locations in the 'poor' range too.

Delhi has not yet experienced the cold wave this season, however, the city is still covered with smog, and the air quality continues to threaten people's health. The Delhi winters haven't peaked yet, so what made the pollution so worse already? Gufran Beig, Chair Professor at National Institute of Advanced Studies, IISC-Campus and Founder Project Director SAFAR, writes for Indian Express that while the AQI right now may be 'very poor', "It will return, playing hide-and-seek for at least another month".

No Buffer To Protect Public Health From Delhi's Air Pollution

He says that the wind speed across Delhi and its wider airshed "dropped close to zero". This means "nothing was coming in and nothing was going out". He also noted that stubble burning in the neighboring state is not the problem, rather Delhi is choking on its own emission. He explains that the vertical dispersion was restricted by a shallow inversion layer, which was approximately 500 to 700 metres deep. Which means, emission from a fixed point sources linger where they released, and it creates a localized pollution hotspot instead of spreading, because there was almost no wind.

He explained that the atmosphere here has temporarily lost its capacity to clean itself. Even if this is for couple of days, this has become very apparent in Delhi. "When the air stands still, stagnation sets in, ventilation collapses, and the system is left with no buffer to protect public health. When the weather naps, there is nowhere left to hide. Yet, we continue to blame the weather instead of our emissions," he writes.

Read: AQI Explained: It’s Not Temperature, As Delhi CM Says, Here’s What the Air Quality Index Really Means

Could There Be A Solution?

Beig writes that if Delhi is able to cut its local pollution by 50 per cent, the pollution too could drop by 50 per cent. The emission should happen across the airshed. However, the focus should be for a long-term action on the source of emission and not short-term optics like cloud seeding, smog towers, water sprinkling or air purifiers.

In fact, as per a study published in Sustainability (MDPI), an open access journal, which mapped Delhi's air quality between 1990 to 2022 and found that transports emit around 10 to 30% of pollution, whereas agricultural residue burning, which is a seasonal source of pollution leads to less than 3% of pollution, whereas firecrackers, another seasonal source, leads to less than 1% of pollution.

Pollution's Impact On Health

However, despite the global studies highlighting the country's ever-growing pollution problem, the Centre stated that "there is no conclusive data available in the country to establish direct correlation if death/disease exclusively due to air pollution."

The study estimated: “1·5 million deaths occurred annually due to long-term exposure to PM2·5 in India every year in excess of the 5 μg/m3 that is recommended by the WHO ambient air quality guidelines.”

The study noted that every 10μg/m³ increase in annual PM2·5 concentration was associated with an 8.6 pc higher risk of all-cause mortality.

Using India’s National Ambient Air Quality Standards, researchers estimate that about 3.8 million deaths between 2009 and 2019 were linked to PM2.5 exposure. When WHO guidelines were applied, the number rose sharply to 16.6 million, nearly one-fourth of all deaths in the country. The analysis relied on advanced causal methods and high-resolution models that mapped district-level PM2.5 exposure across India, while accounting for factors such as socioeconomic status, age distribution, and indoor air pollution.

Norovirus, often called the “stomach flu” or “winter vomiting illness,” is currently circulating in California and across the United States. Health experts say proper cleaning and disinfecting can slow its spread. These precautions matter because norovirus is extremely contagious and there is no specific treatment for it, according to the Centers for Disease Control and Prevention.

Between August 1 and November 13, health officials recorded 153 norovirus outbreaks across 14 states. The CDC defines an outbreak as two or more similar illnesses linked to suspected or lab-confirmed norovirus cases. Although California is not among the states reporting outbreaks, CDC data shows a noticeable rise in positive norovirus tests throughout November across the western US.

What Is Norovirus?

Norovirus is described as a “highly contagious” virus that causes vomiting, diarrhea, and stomach cramps, according to the California Department of Public Health. It leads to acute gastroenteritis, which means inflammation of the stomach or intestines, and affects people of all ages, the CDC said.

Despite its nickname, norovirus has nothing to do with influenza. The flu is caused by the influenza virus, not norovirus, the agency clarified.

Winter Vomiting Disease: How Does The Stomach Bug Spread?

Norovirus spreads easily from person to person, especially while someone is actively sick, according to the California Department of Public Health. Symptoms usually last one to three days, but a person can still spread the virus for up to two days after they start feeling better.

The virus is present in vomit and stool and can spray into the air or settle on nearby surfaces. It can survive for weeks on uncleaned items such as countertops, phones, and doorknobs, the department said.

“You can get sick after touching or caring for someone who is sick, or after touching or eating something that is contaminated,” the department noted.

Norovirus spreads quickly in crowded or enclosed settings, including schools, child care facilities, hospitals, nursing homes, jails, and cruise ships.

According to state and federal health officials, the most common ways people catch norovirus include:

• Touching, caring for, or sharing food with someone who has norovirus
• Eating or drinking contaminated food or beverages, including undercooked shellfish like oysters
• Touching a contaminated surface and then touching your mouth before washing your hands
• Sharing a toilet or bathroom with someone who is sick
• Swallowing contaminated water, including water from swimming pools or recreational areas
• Cleaning up vomit or diarrhea without protective gear, such as gloves or a face mask

Do You Need To Disinfect After Norovirus?

“If you or someone in your household has norovirus, it’s important to clean and disinfect areas where vomiting or diarrhea occurred,” the California Department of Public Health advised. Cleaning with soap and water removes germs, while disinfecting kills those that remain.

You can use commercial disinfectants, but it’s important to read the label and make sure norovirus is listed among the germs it targets. You can also check the Environmental Protection Agency’s registration number and confirm it appears on the EPA’s List G, which includes products proven effective against norovirus.

Another option is making a bleach solution at home. The US Department of Agriculture recommends mixing 5 to 25 tablespoons of household bleach with one gallon of water. This solution should be used only on hard or nonporous surfaces and applied with a spray bottle or disposable mop, sponge, or paper towel. Let it sit for about five minutes before wiping it away.

The USDA also advises paying close attention to frequently touched items such as doorknobs, handles, and remote controls. Many disinfectant wipes do not fully kill norovirus, the agency warned.

How To Disinfect After Norovirus?

The CDC recommends wearing rubber or disposable gloves while cleaning. Use paper towels to wipe the affected area completely, then place the towels in a plastic trash bag. The California Department of Public Health also suggests wearing a face mask.

After disinfecting, clean the area again with soap and water, the CDC said. Keep in mind that vomit can aerosolize the virus, meaning surfaces several feet away may also be contaminated, according to the USDA.

Once you’re done, throw away the gloves and mask, then take out the trash, the California Department of Public Health advised.

Millions of people across the UK who take certain everyday medicines are being warned by the NHS to steer clear of a specific fruit. Health officials say combining this fruit or its juice with some medications can trigger serious reactions and unexpected side effects. The advice applies to patients prescribed some of the most commonly used drugs in the country, including certain statins, amlodipine, and medicines for anxiety. Statins, in particular, are widely prescribed to help reduce levels of “bad” LDL cholesterol in the blood.

Why Statins Are Commonly Prescribed?

Statins work by limiting how much cholesterol the liver makes. This helps slow down the build-up of fatty deposits inside the arteries, which in turn lowers the risk of heart attacks and strokes. Doctors prescribe statins both to manage high cholesterol and to prevent future heart-related problems. For most people, they are taken daily as tablets and are often part of long-term treatment.

What Does Amlodipine Do?

Amlodipine, commonly sold under the brand name Istin, belongs to a group of medicines known as calcium channel blockers. It is mainly used to treat high blood pressure. For people with hypertension, amlodipine can reduce strain on the heart and lower the risk of serious complications such as heart disease, heart attacks, and strokes.

NHS Warning On Statins Or Amlodipine

Patients taking certain forms of amlodipine, particularly calcium channel blockers, are advised not to consume grapefruit. The NHS website clearly states: “Do not take amlodipine with grapefruit juice.”

The reason lies in how grapefruit affects the body. It interferes with enzymes and transport proteins in the gut, such as CYP3A4 and P-gp, which normally help break down medicines and control how much enters the bloodstream. When these processes are blocked, higher-than-intended amounts of the drug can build up in the body, increasing the risk of side effects.

What Patients Should Keep In Mind

Not every medicine reacts the same way to grapefruit juice, which is why doctors advise checking before making changes. Always speak to your GP or pharmacist, read the information leaflet that comes with your medicine, and look out for any warnings related to grapefruit.

It is also important to understand that simply spacing the fruit and the medicine apart is not enough. In most cases, grapefruit should be avoided entirely for as long as you are on the medication, unless your doctor says otherwise. Patients are also encouraged to be cautious with other citrus fruits, such as Seville oranges, pomelos, and limes, as they can have similar effects on how medicines work.

What To Do If You’ve Already Consumed It?

If you have eaten grapefruit or had its juice while taking statins, amlodipine, or anti-anxiety medication, there is no need to panic. In many cases, a single exposure does not lead to serious harm, but it is important to stay alert. Pay attention to how your body feels over the next day or two, especially if you notice symptoms such as dizziness, muscle pain, unusual tiredness, nausea, flushing, or a sudden drop in blood pressure.

Do not stop taking your medication on your own. Skipping doses or stopping treatment abruptly can be risky, particularly for heart and blood pressure medicines. Instead, make a note of what you consumed and when, and contact your GP or pharmacist for advice. They can tell you whether any action is needed based on the specific drug, dose, and your overall health.