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.

Indian jewelery designer Saba Ali Khan, daughter of veteran actress Sharmila Tagore and cricketer Mansoor Ali Khan Pataudi, has opened up about her brain tumor diagnosis at the age of 27.

Speaking on her sister, actress Soha Ali Khan’s podcast, Saba recalled that her diagnosis came as a surprise, without common warning signs such as headaches or vision loss.

Dr. Mazda K. Turel, the neurosurgeon who treated her at Wockhardt Hospitals, Mumbai, told HealthandMe that people with brain tumors can be “walking, talking and functioning normally” despite having a potentially serious tumor. He explained why tumors can go unnoticed and which symptoms warrant medical attention.

How Saba Ali Khan Discovered Her Brain Tumor

Saba recalled fainting while out with a friend. After losing consciousness a second time, she took around 20–25 minutes to regain consciousness.

An MRI revealed a shadow in the third ventricle of her brain. Doctors initially diagnosed a colloid cyst, a rare, non-cancerous growth.

Six months later, she underwent surgery and was diagnosed with pilocytic astrocytoma, a slow-growing, generally low-grade tumor of the brain or spinal cord.

Also read: Survival In Aggressive Brain Tumors Improves By Up To 50% in India, Say Doctors

Why Brain Tumours Go Undetected In Young Adults

“Brain tumors don’t check your age before making an appearance,” Dr. Turel said. “In young adults, symptoms are often dismissed as stress, migraines, fatigue or lack of sleep. Some tumors grow slowly, allowing the brain to adapt remarkably well.”

“The brain has an extraordinary ability to compensate, especially when a tumor grows slowly or develops in a relatively silent area,” he explained.

Early signs may include persistent headaches, subtle personality changes, difficulty concentrating, blurred vision and unexplained seizures. Other clues include forgetting familiar words, unexplained irritability, occasional imbalance and brief episodes of staring or losing awareness.

Sometimes, family members notice changes before the patient does. Dr. Turel illustrated the difference between ordinary forgetfulness and a potentially concerning change: “If you forget keys, that is OK, but if you forget what the keys are for,” it is a sign to get checked.

“The problem is that these symptoms are common, but their persistence or progression is what deserves attention,” he told HealthandMe.

How Tumor Location Affects Symptoms

Read More: Can 'Eye Strain' Lead To Brain Cancer? Experts Explain

Symptoms often depend more on where a tumor is located than on its size, Dr. Turel explained.

• Frontal lobe: Changes in personality or judgement.
• Temporal lobe: Memory problems or unusual seizures.
• Visual pathways: Blurred or double vision.
• Cerebellum: Problems with balance and coordination.

“New speech difficulties, weakness, unexplained seizures or progressive cognitive changes should never be casually dismissed,” he warned.

Brain Tumor Or Migraine: When Should A Headache Worry You?

Migraines usually follow a recognizable pattern and may involve nausea or sensitivity to light and sound, Dr. Turel said.

Tumor-related headaches are more concerning when they are new, progressively worsening, different from previous headaches or accompanied by neurological changes. They may be worse in the morning or with coughing and straining, although this is not always the case.

A persistent headache that progressively worsens, wakes someone from sleep or occurs with vomiting, visual changes or neurological symptoms warrants medical evaluation.

"A sudden, explosive headache that reaches maximum intensity within seconds—a thunderclap headache—is a medical emergency," the neurosurgeon said, noting that it can occur while "walking, talking and functioning normally"

It may indicate bleeding around the brain from a ruptured aneurysm rather than a tumor. Sudden weakness, confusion, loss of consciousness or a first seizure also require emergency assessment.

“Most headaches are not caused by brain tumors, and a headache alone rarely indicates one. The key is not to panic about every headache, but to recognize when an old familiar headache begins behaving like a stranger,” Dr. Turel said.

When was the last time you stood in a queue without looking at your phone? Or had a cup of tea without scrolling through messages? Or sat in a car, waiting for someone, without opening Instagram simply because there was nothing else to do?

Try it today. Put your phone away for 10 minutes and do absolutely nothing with it. It sounds easy. For many of us, it isn't. The first thing you may notice is not peace, but restlessness. You may wonder if someone has messaged you. You may feel like checking the news, looking at the time or opening an app without even knowing why.

As a neurologist, I find this interesting because it tells us something about how we have trained our attention. Our phones have become so closely woven into everyday life that we often reach for them before we even realize we are bored.

The problem isn't the phone. It's the constant need for stimulation. There is nothing inherently wrong with using a smartphone. We use it to work, communicate, navigate, learn and stay connected.

The problem begins when every small gap in our day has to be filled.

Waiting for the lift? Check the phone.

Waiting for your coffee? Scroll.

Watching television? Check messages.

Feeling slightly bored? Open an app.

Our brains are naturally drawn towards novelty. A notification, a new message or a fresh video gives our attention something new to respond to. When this happens repeatedly, checking the phone can become almost automatic.

That is why I sometimes ask patients not only how much time they spend on their phones, but how often they feel the need to check them. Those are two very different questions.

What Happens When The Screen Goes Away?

The first few minutes may feel surprisingly busy inside your head. An unfinished conversation may come to mind. So might tomorrow's meeting, a pending task or something that has been worrying you. You may also find yourself simply daydreaming.

We often assume that a quiet mind should mean an empty mind. It doesn't. When there is no constant stream of information coming from outside, the mind naturally moves towards memories, plans, emotions and thoughts that have been sitting in the background.

That isn't necessarily overthinking. It is part of normal mental activity. Sometimes we are so quick to distract ourselves that we don't give ourselves the opportunity to notice what we are actually thinking or feeling.

What Should Concern Us Is Fragmented Attention

There is another part of this conversation that gets overlooked. We often talk about screen time, but the way we use our screens matters too. Imagine someone working on an important task but checking WhatsApp every few minutes, responding to an email, looking at a notification and then returning to the original task. Even if the total phone usage doesn't look alarming, their attention has been repeatedly pulled away.

Over time, this can make uninterrupted concentration feel uncomfortable.

So instead of asking only, “How many hours am I on my phone?”, perhaps we should occasionally ask, “How often am I allowing my attention to be interrupted?”

Try The 10-minute Test

You don't need to give up your phone or spend an hour meditating. Start small.

Have your morning tea without a screen. Sit on the balcony. Take a short walk without headphones. Wait for five or 10 minutes without automatically reaching into your pocket.

Don't try to stop your thoughts. Just notice them. You may discover that you are more restless than you expected. Or perhaps you will find that your mind settles after a few minutes.

Either way, that is useful information. Mental wellbeing isn't only about learning how to manage stress when it becomes overwhelming. It is also about creating small pockets of time in which the brain isn't constantly being asked to consume, respond and move on.

In a world that has made every spare minute scrollable, being comfortable with a little silence may be a surprisingly valuable habit for the brain.

(Dr Neha Pandita, Senior Consultant Neurologist and Unit Head, Clinical Lead - Parkinson's disease & Movement Disorders, Fortis Hospital, Noida)

For someone who has been hospitalized with heart failure, going home from the hospital can feel like a turning point. The breathlessness may have eased, the swelling may have reduced, and normalcy returns slowly. But feeling better does not mean that the condition has been cured. However, heart failure is a chronic and progressive condition in which the heart is unable to pump blood effectively enough to meet the body's needs.

The course of heart failure can include periods when patients feel stable and periods when their condition worsens. A worsening episode may require hospitalization or additional treatment, but even after the immediate episode has been stabilized and the patient is discharged, the underlying heart failure remains. The months following discharge from the hospital are a crucial period, when continued treatment, follow-up and attention to changes in symptoms can make a meaningful difference.

Why The Risk Remains After Discharge

People who have recently experienced a heart failure episode are at higher risk of their condition worsening again. The period after discharge should therefore not be viewed simply as a return to normal life, but as a phase when continued monitoring, follow-up and treatment remain important.

The risk is reflected in the outcomes after discharge. Within one year, studies have reported a heart failure readmission rate of nearly 30%, while all-cause mortality was 37%. This highlights why the months following hospitalization require particular attention, even when symptoms have improved.

A heart failure hospitalisation is also an important marker of future outcomes. In patients with recurrent multiple heart failure hospitalizations, the risk of cardiovascular death and all-cause mortality is six times higher in patients with four or more heart failure hospitalisations compared with patients with no heart failure hospitalizations.

This makes preventing another worsening episode an important part of long-term heart failure management.

For example, a patient may return home after treatment feeling less breathless and able to resume a daily routine. If, after some time, the same person begins to struggle with a regular walk, develops increasing ankle swelling, or takes longer to recover from everyday activity, these changes should not be ignored. They may indicate that heart failure is worsening again and should prompt a timely conversation with the doctor.

Continued Care Can Help Reduce Future Risk

Recognizing this period of increased vulnerability is not intended to create fear, but to encourage timely care. Patients should take their medicines exactly as prescribed and keep their follow-up appointments. Patients and their families should also be aware of the warning signs that indicate the condition may be worsening. This includes symptoms such as breathlessness; swelling of the legs or ankles; reduced ability to exercise; lack of appetite; nausea; increased heart rate; weight gain from fluid build-up; dizziness; or lightheadedness.

If familiar symptoms return, become more frequent or severe, or begin to affect everyday activities, the doctor should be consulted promptly. Regular follow-ups also provide an opportunity to assess whether the condition remains stable and treatment continues to meet the patient's needs.

Even when patients are stable with current treatment, the risk of hospitalization or serious cardiovascular outcomes can remain. Timely and appropriate treatment, including newer therapeutic approaches where suitable, can help reduce this risk.

Hospitalization following heart failure should not be seen as an episode to recover from, but as a reminder of the need for continued care in the months to follow. Patients and families who understand the warning signs, stay consistent with treatment and follow-up, and consult with the doctor regularly are better placed to manage the risk.

By Dr KV Srikanth, Consultant Interventional Cardiologist, KIMS Hospital, Electronic City, Bengaluru