Blue light emitted by devices like smartphones, computers, and televisions is becoming a major factor disrupting our sleep cycles. Research reveals that a significant number of Americans use electronic devices close to bedtime, contributing to poor sleep quality. Reducing exposure to blue light, particularly in the evening, is a simple yet effective way to help your body prepare for restful sleep.

What Is Blue Light?

How Does Blue Light Impact Circadian Rhythms?

Circadian rhythms are 24-hour cycles that control essential bodily functions, including sleep. Light is the primary factor that aligns these rhythms with day and night. Historically, exposure to sunlight during the day helped set our body clocks, signaling when to be awake and when to sleep. However, the widespread use of artificial lighting and electronic devices has introduced more light exposure after dark, disrupting these natural cycles.

Blue light, in particular, has the strongest impact on circadian rhythms. During daylight hours, blue light helps us feel alert by stimulating the brain, raising body temperature, and increasing heart rate. But in the evening, exposure to blue light can confuse the body’s internal clock, suppressing melatonin—the hormone responsible for making us feel sleepy. As a result, our brains may remain in “daytime mode,” preventing us from winding down for the night.

Health Consequences Of Disrupted Sleep

Persistent disruption of circadian rhythms can lead to a range of health issues, including metabolic disorders, poor mental health, and increased risk for conditions like depression and anxiety. Furthermore, the inability to sleep well at night affects cognitive performance, mood, and overall well-being. Chronic exposure to blue light in the evening may significantly contribute to these negative health outcomes.

Devices That Emit Blue Light

Many common devices in our daily lives emit blue light, including:

- Smartphones and tablets

- Computer monitors and laptops

- Televisions and e-readers

- LED and fluorescent lighting

- Video game consoles

How To Minimize Blue Light Exposure

To reduce the effects of blue light on your sleep, here are some practical strategies:

1. Turn off screens before bed: Try to avoid using electronic devices at least two to three hours before bedtime. Reducing screen time helps prevent blue light from interfering with melatonin production.

2. Adjust your lighting: Dim your home’s lights or switch to warmer-toned lighting in the evening. You can also use lamps with red or orange light, which are less likely to impact your circadian rhythms.

3. Night mode settings: Many smartphones and computers have a "night mode" feature that reduces blue light emission. Make use of these features to limit exposure in the hours leading up to bedtime.

4. Blue light-blocking glasses: Special glasses designed to filter out blue light may be helpful for some individuals. These glasses can block or reduce the melatonin-suppressing effects of blue light.

5. Apps for blue light reduction: There are several smartphone and computer apps available that reduce blue light emission, allowing you to use your devices before bed without disturbing your sleep.

6. Create a sleep-friendly environment: If you can’t control light sources in your bedroom, consider using an eye mask to block out ambient light and promote better sleep.

The ongoing Ebola outbreak in Africa, with nearly 1,000 cases and over 200 deaths, has sparked concerns among people, bringing back memories of the COVID-19 pandemic. With every new outbreak, fears about viruses becoming airborne like SARS-CoV-2, the virus behind COVID-19, tend to rise.

However, experts have clarified that Ebola is not airborne and does not spread like COVID-19.

Why Ebola Spread Is Not Like COVID

“Ebola is a serious viral hemorrhagic disease,” said Dr. Ishwar Gilada, Secretary General, People’s Health Organisation (India).

“Ebola does NOT spread through casual airborne exposure like influenza or COVID-19. Individuals become infectious only after symptoms begin, not during the incubation period. The incubation period ranges from 2 to 21 days,” he added.

Former AIIMS Director Dr. Randeep Guleria told PTI that Ebola is “a zoonotic infection, mainly originating in bats.”

“Ebola does not spread through air like respiratory viruses. It spreads only through direct contact with infected body fluids,” he added.

Experts further explained that Ebola is far more difficult to spread than airborne respiratory viruses such as influenza, COVID-19, measles, and even the Andes strain of hantavirus, which recently caused an outbreak on a cruise ship.

“Ebola is not airborne. There's no evidence of that at all. To be infected, you've got to have body fluid contact with someone who is quite ill,” said Michael T. Osterholm, Director of the Center for Infectious Disease Research and Policy (CIDRAP) at the University of Minnesota.

According to Peter Hotez, Dean of the National School of Tropical Medicine at Baylor College of Medicine, people with Ebola do not spread the virus before developing symptoms.

The experts reiterated that during Ebola’s incubation period, which ranges from 2–21 days, an infected person is generally not contagious, unlike COVID-19, where transmission can occur before symptoms appear.

Moreover, even early Ebola symptoms such as fever, sore throat, headache, and body aches are less likely to spread the virus compared to respiratory infections.

Ebola does not spread through coughing, sneezing, or casual contact like shaking hands.

“You cannot get Ebola from passing someone in an airport, sitting near someone freely, or through other casual contacts,” explained Captain Satish K. Pillai, Incident Manager for Ebola Response at the US Centers for Disease Control and Prevention (CDC).

Also read: Ebola Cases Cross 900, Death Toll Tops 200; 10 Countries On High Alert

How Ebola Spreads

Ebola spreads through:

• Direct contact with infected blood or bodily fluids
• Contact with contaminated surfaces or medical equipment
• Unsafe caregiving exposure
• Traditional burial practices involving direct contact
• Certain zoonotic animal exposures

Common Symptoms Of Ebola

Common symptoms include:

• Sudden fever
• Severe weakness and fatigue
• Headache
• Muscle and body pain
• Sore throat
• Abdominal pain
• Vomiting and diarrhoea
• Rash

Severe illness may involve:

• Bleeding manifestations
• Shock
• Multi-organ dysfunction

Historical case fatality rates have ranged from 25% to 90%, depending on the virus strain, outbreak conditions, and access to timely medical care.

Ebola: How You Can Stay Safe

• Washing your hands often
• Avoiding contact with bodily fluids
• Avoiding contact with individuals who appear ill or who have a fever
• Avoiding objects that have come in contact with an infected individual, such as bedding, clothing or medical equipment
• Not handling someone who has died from Ebola
• Avoiding contact with bats and nonhuman primates, and raw meat from these animals
• Avoiding seeking medical care at hospitals where patients are being treated for Ebola
• Paying attention to your health for 21 days after returning from a country where Ebola has been found
• Seeking medical attention immediately if you experience any Ebola symptoms

How To Prepare Healthcare Systems

Dr Gilada stressed the importance of:

• Immediate isolation protocols for suspected cases
• PPE readiness across designated hospitals
• Emergency infection control drills and refresher training for healthcare workers
• Laboratory diagnostic preparedness with safe specimen handling
• Contact tracing systems
• Central and state public health coordination

The expert also urged authorities to strengthen “science, surveillance, preparedness, and infection control” to curb the spread of the disease.

Dr Guleria called for stricter infection control, timely isolation, and avoiding direct contact with infected persons remain key preventive measures. They also noted that Ebola outbreaks have largely remained confined to Africa due to effective containment efforts.

COVID-19 is not only a name but a terrible memory for the world, which made people stuck in their homes for months and caused thousands of deaths. Although after the advent of vaccines, normal life regained its pace, the impact of that turbulent time persists in everyday life. One example of a negative after-effect is the rising number of hip replacement surgeries among young Indians, which is, without a doubt, a worrying post-pandemic orthopaedic trend.

This very trend of rising cases of hip replacement surgeries is so serious that it was a major issue of discussion in the 2nd DELHI HIP 360 Conference, held at Crowne Plaza New Delhi. Where doctors reported a significant rise in cases of hip arthritis and avascular necrosis (AVN), a painful condition caused by disruption of blood supply to the hip bone, particularly among younger and middle-aged adults. The conference was organised by the Delhi Orthopaedic Association in association with the Indian Arthroplasty Association.

In the second edition of this conference, Dr. L Tomar, Organising Chairman of DELHI HIP 360 and Director, Department of Orthopaedics and Joint Replacement at Max Hospital, New Delhi, said, “We are observing 40% rise in hip replacement surgeries in younger people. Steroids played a life-saving role during the COVID pandemic, but indiscriminate or prolonged use in some patients has been associated with a rise in osteonecrosis and early degenerative changes in the hip joint." He also added that they are now seeing relatively younger patients coming with severe hip damage, collapse of the femoral head, and advanced arthritis requiring early hip replacement surgeries.

Dr. L Tomar further added, “India is witnessing a silent rise in hip disability due to a combination of post-COVID complications, obesity, sedentary lifestyle, trauma, alcohol consumption, and increasing life expectancy. Early diagnosis is critical because if AVN is detected in the initial stages, joint-preserving procedures may still be possible before destruction of the hip occurs.”

Dr. Karun Jain, Organising Secretary of the conference, said, “One of the biggest challenges with AVN is that patients often ignore early symptoms such as groin pain or stiffness, assuming it to be muscular pain. By the time they seek medical advice, the hip joint may already have undergone irreversible collapse. Awareness, timely MRI evaluation, and early intervention can help reduce disability.”

The conference has brought together leading orthopaedic surgeons, arthroplasty specialists, fellows, and residents from across India to deliberate on the latest advances in Total Hip Arthroplasty (THA), complex hip reconstruction, robotic-assisted surgery, rehabilitation, and management of post-COVID hip complications.

The experts at the conference emphasize that the AVN, which was thought of as a disease of the elderly, is no longer limited to a certain age bracket. It can affect young people as well due to the modern sedentary lifestyle. Thus, doctors at the conference are also expecting even greater demand for hip replacement surgeries.

World Thyroid Day is observed on 25 May every year. This day aims to spread awareness about thyroid disorders, their symptoms, and management options that can help women. However, one concern that continues to linger with respect to thyroid disorders is why they occur more often in women. Hormonal changes, lifestyle factors, and a higher risk of autoimmune conditions can increase the risk of thyroid problems in women. Yes, that’s right! Hence, women should ensure they go for timely health check-ups. Here, an expert highlights vital tips for women. Read on to know more about this and seek timely help. Remember, thyroid problems should not be left untreated at all.

In an interview with Health and Me, Dr Shruti Kotangale, Consultant Gynaecologist, Obstetrician, and Infertility Expert at AIMS Hospital, Dombivli, explained why thyroid problems are more common among women. Read here to know how gender makes a difference.

Why do thyroid disorders occur more often in women?

Thyroid disorders are rising among many women. The thyroid is a small gland in the neck, but it plays a critical role in controlling metabolism, energy levels, and maintaining hormonal balance. Women can suffer from thyroid problems because of frequent hormonal changes during puberty, pregnancy, and menopause. These changes can impact thyroid health. Lifestyle factors such as stress, poor diet, and lack of sleep can also worsen thyroid imbalance. Hence, women are at a higher risk of suffering from autoimmune conditions, where the body’s immune system attacks the thyroid gland.

Hypothyroidism vs hyperthyroidism

Conditions such as hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid) are commonly seen in women. Hypothyroidism occurs when the thyroid gland is underactive. Symptoms can include tiredness, weight gain, dry skin, hair fall, constipation, feeling cold, a slow heartbeat, and low mood or depression. Hyperthyroidism occurs when the thyroid gland becomes overactive, and women may experience weight loss, a fast heartbeat, sweating, anxiety, tremors, irritability, frequent bowel movements, and even difficulty sleeping. Women are advised to seek immediate medical attention and manage these symptoms without any further delay.

How to manage thyroid disorders?

Thyroid disorders may be concerning, but they are manageable with appropriate care and management tips as recommended by experts. Both hypothyroidism and hyperthyroidism can be managed with timely diagnosis, regular screening, and taking medications as suggested by the doctor. It is also important to eat a balanced diet, exercise daily for at least 30 minutes, get sound sleep at night, and de-stress through yoga and meditation. This World Thyroid Day, the focus should be on awareness, regular check-ups, and taking small steps to stay healthy and manage thyroid problems. Moreover, follow the doctor’s advice and do not self-medicate, as doing so can be risky.

So ladies, this World Thyroid Day, make an effort to know more about this group of disorders that affects your gender more often than men. Be it fatigue, mood swings, or weight fluctuations, it is imperative to know the early warning signs of this condition in order to work towards a more preventive approach.