Cold sores are a common and often frustrating skin issue. While they may look like harmless blisters, cold sores are actually caused by the herpes simplex virus (HSV).

What Causes Cold Sores?

Cold sores are caused by the herpes simplex virus (HSV), which comes in two types: HSV-1 and HSV-2.

HSV-1 is the primary cause of cold sores, usually appearing around the mouth.

HSV-2 generally causes genital herpes but can also lead to cold sores.

While the appearance of cold sores caused by both HSV-1 and HSV-2 can look similar, their locations tend to differ. However, it is possible for HSV-1 to cause sores on the genitals and for HSV-2 to appear on the mouth.

How Do Cold Sores Spread?

Cold sores are highly contagious and can spread easily. The virus can be passed on through:

• Kissing or skin contact
• Sharing food, drinks, or cosmetics (such as lip balm)
• Oral sex, which can spread both cold sores and genital herpes

Even when a cold sore isn’t visible, the virus can still be spread through close contact. This makes prevention and management key to reducing outbreaks and the risk of infecting others.

Once someone contracts HSV, it stays in the body for life. While the virus remains dormant most of the time, it can reactivate and cause new sores, especially during periods of:

• Stress
• Illness
• A weakened immune system

Unfortunately, there’s no cure for the herpes virus, but the symptoms can be managed.

Symptoms of Cold Sores

Cold sores don’t just appear out of nowhere. Before the sore is visible, you may notice a tingling or burning sensation around the lips or face, which can occur several days before the sore forms. This is the best time to begin treatment to shorten the outbreak.

When a cold sore does appear, it often looks like a red, raised blister filled with fluid. The blister can be painful to touch, and there may be more than one. Cold sores usually last around two weeks and are contagious until they crust over and heal.

The Five Stages of a Cold Sore

Cold sores go through distinct stages as they develop and heal:

• Tingling and itching: You may feel these symptoms about 24 hours before the blister appears.
• Blisters: Small, fluid-filled blisters form, typically around the mouth.
• Bursting: The blisters burst and form painful sores.
• Scabbing: The sores dry out, scab over, and may itch or crack.
• Healing: The scab falls off, and the cold sore heals.

Risk Factors for Cold Sores

Certain factors can trigger the reactivation of HSV, leading to cold sores. These include:

• Infection, fever, or cold
• Sun exposure
• Stress
• Menstruation
• Dental work or injury
• Weakened immune system due to conditions like HIV/AIDS, eczema, or chemotherapy

Managing and Treating Cold Sores

There’s no cure for cold sores, but several treatments can ease the symptoms and help manage outbreaks.

Topical Ointments and Creams

Over-the-counter antiviral creams like docosanol (Abreva) or prescription ointments like penciclovir (Denavir) can help reduce the duration of an outbreak, especially if applied at the first sign of a cold sore.

Oral Medications

Prescription antiviral medications like acyclovir, valacyclovir, and famciclovir can also help, particularly for people who have frequent or severe outbreaks. Your doctor may recommend taking these medications regularly to prevent future outbreaks.

Home Remedies

There are also some home remedies that may provide relief, such as:

• Applying ice or a cold washcloth to the sore
• Using aloe vera gel or lemon balm lip balms
• Applying petroleum jelly to ease discomfort

Canker Sores vs. Cold Sores: What's the Difference?

While cold sores and canker sores may seem similar, they are quite different:

Cold sores are caused by the herpes virus, appear around the mouth, and are contagious.

Canker sores are not contagious and appear as ulcers inside the mouth or throat.

Preventing the Spread of Cold Sores

To avoid spreading cold sores:

• Wash your hands frequently
• Avoid close contact with others during an outbreak
• Don’t share food, drinks, or personal items like lip balm

Cold sores can be a persistent issue, but with proper care and management, you can reduce the frequency of outbreaks and prevent spreading the virus to others.

World Asthma Day is observed globally every year on the first Tuesday of May to raise awareness about the most common chronic non-communicable disease in the world.

The condition affects over 260 million people. It is also responsible for over 450,000 deaths each year worldwide. However, most of these deaths are preventable.

Also Read: World Asthma Day 2026: Can A Heatwave Make Symptoms Worse?

As per the Global Burden of Disease Report (GBDR) 2019, India has the highest and growing burden of asthma in the world in terms of deaths and disability-adjusted life years, and over 3.4 crores of people in India have asthma, despite accounting for only 13 per cent of the world's asthma population, and 42 per cent of global asthma mortality.

World Asthma Day: History

World Asthma Day began in 1998 during the first World Asthma Meeting in Barcelona, Spain.

Coordinated by the Global Initiative for Asthma (GINA), with over 35 countries initially participating, it has grown into a global awareness event held annually on the first Tuesday of May.

GINA is a World Health Organization collaborative organization founded in 1993.

World Asthma Day: Theme

This year, the theme is: “Access to anti-inflammatory inhalers for everyone with asthma – still an urgent need”.

The theme reinforces that every person with asthma, including most pre-school children with asthma, should receive inhaled corticosteroids.

These inhalers reduce the person’s risk of asthma attacks and preventable asthma deaths.

GINA continues to emphasize the need to ensure that all people with asthma can access inhaled medications that are essential for controlling the underlying disease and treating attacks.

Preferably, the inhaler should be a combination 2‑in‑1 inhaler containing both an inhaled corticosteroid and a quick-acting reliever. Together, they treat the asthma symptoms, prevent asthma attacks, and reduce hospital admissions.

Also read: Exposure To Traffic Emissions Before Birth May Delay Speech Development In Children: Study

What is Asthma? Signs and Symptoms

Asthma attacks are mainly caused by the obstruction of the air passages in the lungs, which reduces the ability of the person to inhale life-sustaining oxygen into the body.

The airway obstruction is caused by spasm and tightening of the airway muscles, and inflammation, which causes both swelling of the walls of the air passages and mucus or phlegm blocking the airways.

Common symptoms include

• shortness of breath,
• wheezing (a whistling sound on exhaling),
• chest tightness or pain,
• coughing—often worse at night, early morning, or during triggers like colds, exercise, allergens, or smoke.

How To Treat Asthma

According to GINA, inhaled corticosteroids are essential for treating and controlling asthma.

The short-acting bronchodilator relievers (salbutamol, albuterol, terbutaline, SABAs) only relieve the spasm and tightening of the muscles in the air passages, but inhaled corticosteroid-containing medications prevent asthma attacks by treating the underlying inflammation that causes asthma.

The inhaled corticosteroid-containing medication should be prescribed in addition to, or in combination with, reliever medication, to prevent the continuing avoidable morbidity and mortality from asthma.

In low-middle-income countries, lack of availability or high cost of inhaled medicines, especially inhaled corticosteroid-containing inhalers, are major contributors to the fact that many attacks and 96 per cent of global asthma deaths occur in these countries.

How To Prevent Asthma

Asthma can be prevented by:

• Avoiding exposure to environmental triggers such as air pollution, cold air, fragrances, etc.
• Avoiding contact with allergens.
• Avoiding smoke from cigarettes, candles, incense, and fireworks. Staying away from sick people (cold or the flu)
• Keeping the surroundings dust-free
• Taking vaccinations on time to prevent pneumonia, diphtheria, tetanus, the zoster vaccine, and whooping cough
• Adhering to asthma medications.

If you speak to doctors today, one pattern is becoming very common—women in their 30s are often being diagnosed with both thyroid problems and PCOS together. Earlier, these conditions were seen separately. Now, they frequently show up side by side.

At first, this can feel confusing. The thyroid is a gland in your neck that controls how your body uses energy, while PCOS affects the ovaries, periods, and hormones. They seem unrelated—but inside the body, they are more connected than we think.

Hormonal Imbalance

A big reason behind this overlap is hormonal imbalance. PCOS already disturbs the balance of female hormones and can lead to irregular periods. If the thyroid is underactive, it slows the body’s metabolism and also interferes with hormone levels. When both happen together, symptoms tend to become more noticeable and sometimes more difficult to manage.

Insulin resistance

Another important link is insulin resistance. Many women with PCOS have it, even if they are not diabetic. This means the body struggles to use sugar properly, leading to higher insulin levels. Over time, this doesn’t just affect weight—it also impacts hormones and can indirectly influence thyroid function. That’s why the two conditions often overlap.

Lifestyle

Lifestyle plays a bigger role than we usually admit. In your 30s, life tends to get busy—work pressure, family responsibilities, irregular sleep, and constant stress. Meals are often rushed or skipped, exercise takes a backseat, and screen time goes up. All of this affects the body’s internal balance. Stress hormones, in particular, can disrupt both thyroid function and reproductive hormones.

Weight Gain

Weight gain is another common thread. Many women notice gradual weight gain that doesn’t seem to respond easily to diet or exercise. Thyroid problems can slow metabolism, while PCOS can increase fat storage, especially around the abdomen. This, in turn, worsens insulin resistance—creating a loop that’s hard to break without proper guidance.

It’s also worth noting that we are simply diagnosing more cases now. Women today are more aware of their health and are more likely to seek help for symptoms like irregular periods, fatigue, hair fall, or acne. Earlier, these were often ignored or brushed off as “normal.”

When both thyroid issues and PCOS are present, you may notice:

• Periods are becoming irregular or stopping altogether
• Constant tiredness, even after rest
• Hair thinning or excessive hair fall
• Acne that doesn’t settle easily
• Unexplained weight gain
• Difficulty getting pregnant

How To Manage

The encouraging part is that both conditions can be managed well. The approach is not just about medicines—it’s about small, consistent lifestyle changes. Eating balanced meals, staying physically active, managing stress, and getting proper sleep can make a real difference over time.

The key is to listen to your body. If something feels off and continues for months, don’t ignore it. Getting checked early can save a lot of trouble later.

In the end, this rise in combined thyroid and PCOS cases isn’t random. It reflects how modern lifestyles are affecting women’s health. The good news is—with the right care and awareness, it’s absolutely possible to manage both and stay healthy.

The concept of self-medication in the case of a trivial ailment such as a headache or a small cut is generally considered responsible self-care. Nevertheless, it becomes a matter of public health concern when the process goes through two particular stages. The first of these stages is the “masking of chronic disease." When one uses over-the-counter (OTC) drugs to cover up symptoms of fatigue, acidity, or thirst, he or she ends up masking the symptoms of underlying chronic diseases, which could be type 2 diabetes or high blood pressure, for instance. By the time these symptoms are diagnosed, the condition may have caused irreparable damage to organs. Another health problem created due to self-medication is antimicrobial resistance, which poses a danger not only to the individual but also to society as a whole.

What are the risks of making a self-diagnosis?

Dr Vimal Pahuja, MD, Associate Director, Internal Medicine & Metabolic Physician, Diabetes & Weight Management Clinic, Dr LH Hiranandani Hospital, Powai, Mumbai, said, “The most serious complications include those that have no immediate effects and do not trigger pain signals. DILI is a growing concern in India and is a consequence of the persistent abuse of painkillers (NSAIDs) or even some of the herbal supplements available in the market. In the same way, ‘kidney compromise’ results from prolonged consumption of analgesics. Looking at things from the viewpoint of the endocrine system, the frequent consumption of over-the-counter steroids, which are also included in some ‘miracle’ skin creams and supplements, can affect hormones and lead to the development of secondary diabetes.”

Does it help to ‘Google’ symptoms?

Internet searches usually generate confirmation bias, where patients only seek answers that align with what they want to hear. Health-related social media sites and influencers tend to oversimplify medical issues by encouraging bio-hacking. This results in unsafe practices, such as people prescribing themselves advanced metabolic and hormonal treatments without being aware of the contraindications or the need for clinical testing.

Dr Kirti Sabnis, Infectious Diseases Specialist, Fortis Hospital, Mulund & Kalyan, Mumbai, said, “With the growing emphasis on early and accessible diagnosis, more individuals are becoming proactive about understanding their symptoms and lab reports. This has led to a noticeable rise in what clinicians often refer to as ‘Google diagnosis,' where patients arrive with self-researched conclusions based on online information or AI-enabled report analyses.”

Why is accurate diagnosis important?

The expert went on to say that interpreting symptoms and investigations is rarely straightforward. Fever, for instance, is merely a symptom and can stem from a wide range of causes, from infections to non-infectious conditions such as thyroid disorders. While digital tools and AI platforms can analyse reports and suggest possible conditions, they typically rely on common algorithm-based differentials. In some cases, this may lead to alarming or misleading possibilities such as tuberculosis or even cancer, when the underlying issue could be far less serious.

Accurate diagnosis requires more than data interpretation; it demands clinical expertise, physical examination, and years of medical experience to connect symptoms, history, and test results. Over-reliance on online searches can sometimes lead to unnecessary anxiety, delayed diagnosis, or even self-medication, which may complicate the condition further.

The importance of taking time to explain the reasoning behind prescribed medication is essential, especially when informing a patient that an antibiotic cannot cure their flu.