How Does Heatwave Cause Depression And Other Mental Health Issues?

Updated Jun 27, 2024 | 11:17 AM IST

SummaryHeat waves are bad for your mind as well as your body. They can make you moody, stressed, and unable to sleep well. As heat waves become more common due to climate change, this is a growing concern. Here is what you need to know.
Heatwave and Mental Health (Credit-Freepik)

Heatwave and Mental Health (Credit-Freepik)

The heat waves are rising all over the world and causing a lot of damage. While there are issues of dehydration and heat strokes, studies are suggesting that it might also be responsible for declining mental health, the heat among other things is not only affecting the physicality of human beings but is also having adverse mental health.

Emotional distress: The heat can trigger mood swings, making you feel irritable, anxious, depressed, or even aggressive. You may not be able to predict your reaction, you may be good one moment and then any minor inconvenience will make you angry or sad. Heat often triggers that helplessness in people.

Scattered Focus: Concentrating on tasks becomes a struggle when it's hot. Simple things feel overwhelming, and staying focused is a challenge. While you may be in the zone working on completing something, the heat and sweating will disrupt your flow and then you will not be able to focus on anything other than the heat.

Sleepless Nights: High temperatures, especially at night, disrupt your sleep. This lack of rest can leave you feeling tired, and grumpy, and worsen existing mental health issues. All humans require a comfortable temperature to sleep in, if your body is too wound up or heated up, it will not be able to relax and sleep.

Feeling the Pressure: The heat can pile on stress and make you feel overwhelmed. Concerns about the heat itself or its impact on other aspects of your life can contribute to this feeling. You will feel overwhelmed and unable to work on anything else. The heat makes you feel a certain helplessness, as you cannot stop the sun or turn down the heat.

Body Blues: The heat can cause physical symptoms that affect your mental well-being. Headaches, fatigue, dizziness, and nausea can all contribute to anxiety and low mood. When your body is already fatigued, the urge to do anything else disappears. Your body is drained of energy to function at all and will seek rest and sleep.

Behavioural Shifts: The heat can influence your behaviour. You might act impulsively or have difficulty managing anger. It's like the heat turns up your emotional thermostat. When your body and brain are overheating, it is difficult to think straight and you will grasp at straws to release this energy and pressure off of you.

Some other side effects of the heat are.

  • Mental Health Flare-Ups: If you already have a mental health condition, hot weather can worsen your symptoms. Existing depression, anxiety, bipolar disorder, or schizophrenia might feel more intense.
  • Heat and Suicide Risk: Studies show a disturbing link between hot weather and increased suicide rates, particularly among men and older adults. Hot weather can be a tipping point for those already struggling.
  • Heatwave Hospitalizations: When temperatures soar, people with existing mental health issues may require increased hospitalization. This highlights the need for healthcare systems to be prepared for heat waves.
  • Climate Change and Mental Health: Climate change is leading to more frequent heatwaves. Research suggests this could lead to a rise in mental health problems and suicides. Taking action against climate change is crucial for protecting mental well-being.

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Fact Check: Can Deep Breathing Before Bed Lower Blood Pressure Overnight?

Updated Oct 23, 2025 | 04:00 AM IST

SummaryMost of us breathe thousands of times a day without noticing, but a growing body of research says those breaths might hold more power than we think. In this fact-check, experts break down whether slow, deep breathing before bedtime can really lower blood pressure overnight.
deep breathing blood pressure

Credits: Canva

An average person takes about 22,000 breaths a day, most of them without any conscious effort. Yet research shows that spending just a few minutes on slow, deliberate breathing can help bring blood pressure down, sometimes lowering the top number, or systolic pressure, by as much as 10 points.

Every night before sleep, you might pause, take a deep breath, and feel your body unwind. But can this calming ritual really lower your blood pressure overnight? Social media posts and wellness videos claim it can. We looked into what science and doctors say about this widely shared belief.

What the Claim Says

The idea is simple: if you practise deep, rhythmic breathing before bed—say inhaling for four seconds, holding for four, and exhaling for eight—you’ll wake up with a lower blood pressure reading the next morning. It sounds effortless, but does the body really respond that fast?

What Research Actually Shows

There is solid evidence that slow, deep breathing can help lower blood pressure, though not necessarily overnight. A review published in the Journal of Human Hypertension found that practising slow breathing for just a few minutes daily lowered both systolic and diastolic pressure by an average of 3 to 6 mmHg over time.

Harvard Health Publishing also notes that deep breathing helps by activating the parasympathetic nervous system, which relaxes blood vessels and slows the heart rate, creating a measurable drop in pressure with regular use. In another 2024 clinical study published on PubMed Central (PMC), people who used the 4-4-8 breathing technique for 10 minutes saw their systolic blood pressure fall by about 5.8 mmHg after 30 minutes.

These numbers are modest but meaningful for heart health. Still, most of these effects appeared after consistent practice over days or weeks, not a single night.

The Missing Evidence for the ‘Overnight’ Effect

The viral claim exaggerates the timeline. Few, if any, studies have examined whether one bedtime session of deep breathing can make a measurable difference by the next morning. Blood pressure naturally fluctuates during sleep, so any temporary dip caused by relaxation is likely to even out by morning.

According to cardiologists, the effect is more about long-term nervous system conditioning than an instant fix. The relaxation you feel is real, but its impact on numbers is subtle and cumulative.

Experts still encourage adding deep breathing to your bedtime routine for its calming and sleep benefits. Try this:

  • Sit or lie down comfortably.
  • Inhale through your nose for 4 seconds.
  • Hold your breath for 2–3 seconds.
  • Exhale gently through your mouth for 6–8 seconds.
  • Continue for about 5 minutes.

Practising this nightly for 4–6 weeks can help reduce stress and may gradually lower blood pressure. Keep a log of your readings to notice any steady improvement.

Deep breathing is a simple, accessible way to support heart health, but it’s not a quick overnight fix. The science supports its long-term benefits, not the viral promise of an immediate drop after one bedtime session.

So while your nightly breathing habit won’t transform your blood pressure overnight, it may still be one of the gentlest ways to calm both body and mind, if you make it part of your everyday rhythm.

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Study Reveals That 'Hearing Voices' Can Stem From The Brain Misunderstanding Its Own Speech

Updated Oct 23, 2025 | 02:00 AM IST

Summary‘Hearing Voices’ or ‘listening to someone who isn’t here’ is a trope often used in movies, however, these only show one aspect of the spectrum known as schizophrenia. However, where do these voices come from, and what are they? A new study revealed what these voices actually are. Here’s how.
Study Reveals That 'Hearing Voices' Can Stem From The Brain Misunderstanding Its Own Speech

(Credit-Canva)

‘Hearing voices’ or ‘Auditory hallucinations’ is always seen as a sign of someone without a ‘healthy’ or ‘sound’ mind. Yet, many misunderstand what these experiences truly represent. Auditory hallucinations are basically hearing a sound that isn’t there. According to the Schizophrenia Research journal, about 60-80% of people who are on the schizophrenia spectrum experience these. However, do you know where these ‘voices’ come from?

A major new study published in the journal Schizophrenia Bulletin gives the strongest proof yet that when people with schizophrenia hear voices, they are actually mistaking their own silent thoughts for sounds coming from outside. Their brains respond more strongly when their inner voice aligns with an outside sound. Individuals with schizophrenia who recently experienced auditory hallucinations had a much bigger brain reaction when their inner voice matched an outside sound.

What Causes Verbal Hallucinations?

The study, which was done by psychologists at UNSW Sydney, suggests that the problem of hearing voices, called auditory verbal hallucinations, happens because the brain has trouble figuring out that the silent voice inside their head belongs to them.

What is Inner Speech?

Inner speech is just the silent voice that goes on in your head, like a narrator for your thoughts, plans, and everything you notice. Most people have this running all the time.

The Normal Brain Filter

When a person speaks, even if they only speak silently in their mind, the part of the brain that deals with outside noises calms down. This happens because the brain expects the sound of your own voice and basically tunes it out so you aren't distracted by yourself.

But in people who hear voices, this "filtering" process seems broken. The brain doesn't manage to predict the sound of its own inner voice, which causes it to react as if the voice is coming from someone else entirely.

How Did Researchers Measure Inner Voice?

For a long time, doctors have had a theory that hearing voices came from mixing up inner speech with external speech, but it was incredibly hard to test because you can't actually hear someone else's inner speech. It's totally private. Researchers used an EEG machine (which records the brain's tiny electrical signals) to secretly test this idea. They divided the people into three groups:

  • People with schizophrenia who had very recently heard voices.
  • People with schizophrenia who had not heard voices recently.
  • Healthy people who did not have schizophrenia.

In the experiment, everyone wore headphones and was told to imagine saying a simple sound (like 'bah' or 'bih') at the exact moment they heard one of those sounds played through the headphones.

People with No Hallucinations

In healthy people, when the sound they imagined in their head matched the sound that came through the headphones, the EEG showed less activity in the part of the brain that processes sound. This is the expected filtering effect—the brain recognized its own inner speech and calmed its response.

Hallucination Result (The Reversal)

In the group that had recently heard voices, the results were the complete opposite. When the imagined inner speech matched the external sound, their brains showed a much stronger, enhanced reaction.

This backward filtering effect strongly suggests that the brain's ability to predict and filter its own thoughts is broken in people who hear voices. This failure causes the brain to see that inner voice as a loud, real sound coming from the outside.

How Does Learning About Auditory Hallucinations Help Us?

This discovery is very important because it offers the strongest proof yet for the idea that people's own inner speech is being mistakenly heard as an outside voice.

Right now, there are no simple blood tests, X-rays, or brain scans that can definitively find or diagnose schizophrenia. These new findings give doctors hope for developing biological markers (signs in the body) that could help find or predict who is at risk of developing psychosis before it actually starts.

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This Is The Age Your Brain Performs The Best: Study Reveals Brain Reaches Its Best Years Later Than We Think

Updated Oct 22, 2025 | 11:00 PM IST

SummaryMany believe our cognitive peak occurs in our 20s and 30s, but recent research shows the brain may actually perform at its best much later. As soon as people start to reach the age above this, assumptions of losing memories and cognitive decline start rising. However, how true is this belief?
This Is The Age Your Brain Performs The Best: Study Reveals Brain Reaches It's Best Years Later Than We Think

(Credit-Canva)

Our bodies may hit their peak strength, skin firmness, and ability to have children when we are young adults, but new studies have found that our brains actually perform their best much later in life.

As people get old, the perception that they are no longer capable of making decisions or that they stop remembering things becomes rampant. These assumptions can lead to age-based discrimination, such as favoring younger employees over older, experienced ones. However, how true is this assumption? Do we actually start experiencing cognitive decline as soon as we come close to midlife?

A study published in the journal Intelligence looked at data measuring abilities like reasoning, memory, processing speed, general knowledge, and emotional intelligence across different ages.

What Age Are We Best Mentally?

The findings challenge the idea that we’re mentally sharpest in our 20s. Instead, the research found that our overall psychological functioning peaks much later, typically between ages 55 and 60.

According to the lead study author, our mental ability doesn't really start to drop until around age 65, and the decline only gets noticeably faster after age 75.

The research also looked closely at five main personality traits: being outgoing, handling stress well, being careful and organized, being open to new things, and being agreeable.

How Does Our Personality Affect Our Brain Health?

The researchers discovered that many of these traits also reach their best levels later in life. For example, conscientiousness (being thorough and disciplined) peaks around age 65, and emotional stability (staying calm and balanced) is highest around age 75.

The study further found that our ability to make good moral judgments improves with age, and our skill at making rational decisions (resisting poor cognitive biases) may continue to improve even into our 70s and 80s. This helps explain why many top jobs in business and government are often held by people in their 50s and early 60s.

What Role Does Age Play In Real World?

This latest research focused on real, measurable psychological strengths that directly lead to better performance in the real world. Many of these strengths, like better judgment and decision-making, are vital for people in leadership positions.

However, despite these clear signs that older people are at their psychological peak, they still often face major challenges when looking for a new job or trying to stay in their current one.

Even though there is a law (the Age Discrimination in Employment Act of 1967) that protects people aged 40 and over from unfair treatment in hiring and firing, discrimination still happens in reality. An Ageism in the Workplace Survey found that a huge 90% of workers over age 40 have experienced ageism at work. Many employers wrongly believe that someone in their mid-50s is a poor long-term investment.

The hope is that these new findings will make it clear that companies need to adopt fair hiring and retention practices that include older workers. As the author noted, history is full of people who achieved their biggest successes well past the age society usually labels as the "peak."

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