The world that we live in is filled with sounds, some are comforting and some could be jarring too. But what if the constant noise surrounding us is doing us more harm than we realize? There has been immense research that shows that noise is not just a nuisance, but a silent killer and affects our health in ways we do not even know. There are associations of sound causing heart attacks, type 2 diabetes, and dementia.

How Does Your Body Respond To Noise?

Noise is seen as an annoyance, but it effects can go beyond what we imagine. When we hear a sound, it travels through the ear to the brain. This is where it gets processed by the amygdala. It is a region that is responsible for emotional responses. This also triggers a stress response- our heart rate increases, our blood pressure rises, and stress hormones like cortisol flood our system.

This response is also designed to help us react to immediate threats. Especially, if we hear the sound of a predator approaching. However, when we are exposed to constant noise, this response is triggered repeatedly and could compel us to live in a long-term anxious state.

Hidden Health Risks

Many studies including Harvard Health and theAmerican College of Cardiology have found associations of noise with health problems including putting a person at a higher risk of cardiovascular diseases such as heart strokes, attacks, and high blood pressure. The constant activation of the stress response can take a toll on the body, increasing inflammation and making it harder for the heart and circulatory system to function properly. Over time, this can lead to serious health conditions like heart disease and diabetes.

Even more troubling, research suggests that noise pollution may contribute to mental health issues. Studies have found a strong connection between exposure to noise and disturbed sleep, which in turn can cause anxiety, depression, and cognitive decline. The World Health Organization estimates that noise contributes to around 12,000 premature deaths annually across Europe alone. This invisible threat, however, is often overlooked because the effects are gradual and cumulative.

Noise and Sleep: A Silent Disturbance

One of the most insidious aspects of noise pollution is its impact on sleep. Even when we are asleep, our bodies are not fully immune to the effects of sound. Our ears never fully “turn off,” meaning that even faint noises can disrupt our sleep cycle. Research has shown that people who live in noisy environments—whether near busy roads, airports, or urban centers—often experience fragmented sleep, leading to fatigue and a weakened immune system. Over time, this chronic lack of restful sleep can lead to significant health problems, including an increased risk of developing cognitive disorders such as dementia.

The Urbanization Problem

As cities continue to grow, noise pollution is becoming more widespread. Traffic noise, in particular, is one of the most common and harmful sources. The rise of urbanization means more cars, buses, and trains, all of which contribute to an ever-increasing din. This urban soundscape is often relentless, with little respite for those living within it. In densely populated cities, people are exposed to high decibel levels, which can exceed safe thresholds for heart health. In many cases, the sheer volume of sound is not just unpleasant; it’s dangerous.

What Can We Do About It?

The solution is not as simple as reducing noise in our immediate surroundings, though efforts to reduce traffic noise and limit industrial sounds are essential. Some cities have taken steps to create quieter spaces by converting busy roads into pedestrian zones or installing noise barriers. These measures have shown to have a positive impact on public health, with research suggesting that even small reductions in noise can prevent premature deaths and improve overall well-being.

It was during the COVID-19 pandemic that Annabelle Gurwitch, an American author, actress, and television host, developed a "a little persistent cough".

Suspecting it to be a COVID symptom, Annabelle went for a check-up. Her doctor alarmingly informed her about something suspicious on her lungs. Soon after, an X-ray and a biopsy confirmed her diagnosis of stage 4 cancer.

But, here's the catch. Annabelle is a non-smoker. She also lived a healthy lifestyle and exercised every day, and felt like she was in really good health, besides the persistent little cough.

Also read:American Author Annabelle Gurwitch Writes New Memoir On Stage-4 Lung Cancer Diagnosis

HealthandMe spoke to health experts to understand how a persistent cough signals the risk of lung cancer.

If you, too, are a non-smoker who is leading a healthy lifestyle and has no medical conditions other than a persistent cough, then you must visit your doctor right away, advised the experts.

"A persistent cough can be an early warning sign of lung cancer, especially when it shows specific features rather than behaving like a routine respiratory illness," Dr Sameer Khatri, Principal Director - Medical Oncology, Max Super Speciality Hospital, Patparganj, told HealthandMe.

The doctor noted that the cough becomes suspicious when it persists beyond three weeks without a clear cause or fails to respond to standard symptomatic treatment such as cough syrups, bronchodilators, etc.

"A change in a pre-existing smoker’s cough—for example, becoming more frequent, severe, or different in character—is particularly important. In non-smokers, a new, unexplained chronic cough should not be ignored," Dr. Khatri said.

Certain associated symptoms further strengthen the suspicion of cancer. The most significant is hemoptysis, the coughing up of blood or blood-stained mucus, even if minimal.

Other red flags include

• unintentional weight loss,
• chest pain,
• breathlessness,
• hoarseness,
• recurrent pneumonia in the same lung region.
• age >40 years,
• smoking history, occupational exposures.

Persistent cough: TB Vs Lung Cancer

Persistent cough also signals the risk of tuberculosis (TB) -- the world's most deadliest infectious disease. Understanding the differences between these two causes is critical for early diagnosis and timely treatment.

Dr Seema Jagiasi from MOC Cancer Care Center told HealthandMe that the cough in TB may sometimes produce blood-tinged phlegm, but it is usually associated with signs of infection, such as fatigue and a general feeling of illness.

TB is more common in younger populations and in individuals with weakened immunity or poor living conditions.

"In contrast, a cough associated with lung cancer tends to be more insidious. It may start as a dry, persistent cough that gradually worsens over time. Unlike TB, it may not initially present with fever or infection-related symptoms," the doctor explained.

Also read: Suffering From Mid-back Pain? Doctors Say It May Be Spinal TB

One of the key differences lies in progression and response to treatment.

TB is treatable with a course of antibiotics, and symptoms often improve within weeks of starting therapy. However, a lung cancer-related cough persists or worsens despite routine medications.

Dr Jagiasi emphasized that any cough lasting beyond three weeks, especially when accompanied by alarming symptoms, should not be ignored.

"Early investigations, such as chest imaging and further diagnostic tests, can help distinguish between the two conditions," the doctor said.

While both TB and lung cancer may present with a persistent cough, their underlying causes, associated symptoms, and progression differ significantly.

The health experts called for more awareness and the need for timely medical evaluation for the effective management of the disease.

Irish Actor Michael Patrick, known for his significant role in Game of Thrones, has sadly passed away at the young age of 35.

Sharing the news in a post on social media platform Instagram, his wife Naomi Sheehan shared that Michael Patrick (whom she fondly calls Mick) died after a years-long battle with Motor Neurone Disease.

"Last night, Mick sadly passed away in the Northern Ireland Hospice. He was diagnosed with Motor Neurone Disease on 1st February 2023. He was admitted 10 days ago and was cared for by the incredible team there. He passed peacefully, surrounded by family and friends," Naomi said.

Calling Michael a "titan of a ginger-haired man", she said that “Words can’t describe how broken-hearted we are".

Naomi called Michael an "inspiration to everyone."

Also read: Dismissed as Anxiety: Terry Crew’s Wife Rebecca Shares Decade-Long Struggle With Parkinson’s

What Is Motor Neurone Disease (MND)

MND is a rare and progressive neurodegenerative disease. According to NHS UK, it causes muscle weakness that gets worse over a few months or years. It's usually life-shortening, and there's currently no cure, but treatment can help manage the symptoms.

Symptoms of MND include:

• stiff or weak hands
• weak legs and feet
• twitches, spasms, or muscle cramps (where muscles painfully tighten).

It makes everyday tasks such as climbing stairs or gripping objects difficult.

Also read: Grey’s Anatomy Star Eric Dane Dies After ALS Battle

As the disease advances, patients may develop difficulties with breathing, swallowing, and speech, along with changes in mood or personality. In later stages, walking and movement can become extremely limited.

Treatment of MND

About 1,500 people are diagnosed with MND each year, yet treatment choices remain scarce. Only a small proportion of patients currently qualify for therapies that target the disease process itself.

MND can be difficult to diagnose in the early stages. But as the symptoms get worse, it can usually be confirmed.

Tests used to help diagnose MND include:

• blood tests
• tests to check how well your nerves are working
• an MRI scan to help rule out other conditions that affect the brain and nerves

1. Amyotrophic lateral sclerosis (ALS): Early symptoms include muscle weakness in the arms and legs can cause you to trip and drop things.

2. Progressive bulbar palsy (PBP): It mainly affects muscles in the face, throat, and tongue, causing slurred speech and problems swallowing.

3. Progressive muscular atrophy (PMA): It causes weakness in the hands.

4. Primary lateral sclerosis (PLS): Leads to weak legs, sometimes with other symptoms, including speech problems.

Common treatment options for MND include:

• physiotherapy and exercises to help with muscle weakness and stiffness
• dietary advice to help you maintain weight
• speech and language therapist to help with talking
• Cognitive behavioral therapy (CBT) to help cope with emotions and feelings, such as anxiety and depression.

During the COVID-19 pandemic, the SARS-CoV-2 virus had a significant impact on the eyes, causing conjunctivitis (pink eye), with red, itchy, watery, or painful eyes.

A new study now shows that eye symptoms may also be key in understanding the severity of long COVID, a collection of symptoms that last three months or longer after your first COVID symptoms.

The new study, published in the journal Clinical Ophthalmology, showed that the new onset of eye symptoms in people with long COVID may be an indicator of more severe disease.

Also read: Long Covid Causes Lasting Brain Inflammation And Lung Injury, Reveals Study

Key Findings

Researchers from the Yale School of Medicine analyzed survey data from 595 adults who self-reported having long COVID in surveys conducted from May 2022 to October 2023. They found that nearly 60 percent of people reported new-onset of ocular symptoms.

The findings suggest that ocular symptoms in long COVID may be interpreted as vision-related manifestations that cluster with systemic post-COVID conditions. The symptoms include a new onset of :

• blurred or lost vision,
• dry eyes,
• floaters or flashes

Notably, individuals with ocular symptoms reported:

• A greater overall symptom burden,
• Financial difficulties,
• Challenges in everyday life.

Also read: Long COVID: The Story Of Those Who Are Still Dealing With Symptoms And Illnesses

What is Long COVID

Long COVID includes a wide range of symptoms or conditions that may improve, worsen, or be ongoing. While anyone who gets COVID-19 can develop Long COVID, studies have shown that some groups of people are more likely to develop Long COVID than others, including:

• Women
• People who have experienced more severe COVID-19 illness, especially those who were hospitalized or needed intensive care
• People with underlying health conditions
• People who did not get a COVID-19 vaccine

While many of the Long COVID conditions remain to be fully recognized, some people have more than one symptom that can be moderate to severe, and also impact the quality of life. According to the US CDC, they include:

• Tiredness or fatigue
• Difficulty thinking or concentrating (sometimes called “brain fog”)
• Shortness of breath or difficulty breathing
• Headache
• Dizziness on standing
• Fast-beating or pounding heart (known as heart palpitations)
• Chest pain
• Cough
• Joint or muscle pain
• Depression or anxiety
• Fever
• Loss of taste or smell