Why young adults are feeling tired, stressed, and falling sick

Published on 29 March 2026

Many people in their 20s and 30s feel constantly exhausted. But the causes go deeper than long work hours, and the effects may appear earlier than expected.

At a glance

• Many young adults today live in an “always-on” environment that makes true rest harder to achieve.
• Chronic stress can show up as sleep problems, poor concentration, or unexplained physical symptoms.
• Addressing stress early, especially by improving sleep and recovery, can protect long-term health.

It has become a familiar phrase among young adults: “I’m just tired.”

For many people in their 20s and 30s, exhaustion feels like a normal part of everyday life. Long work hours, constant notifications, and busy schedules often leave little time to truly switch off.

But is this persistent fatigue simply a result of a fast-paced lifestyle? Or is there more to it?

According to Asst Prof Cyrus Ho, Senior Consultant at the Department of Psychological Medicine, National University Hospital (NUH), the answer lies in how modern life keeps people mentally and emotionally switched on for much of the day.

“Exhaustion feels increasingly normal, especially among people in their 20s and 30s, because modern life places constant psychological, cognitive, and emotional demands with very little true recovery,” he explained.

Over the past decade, several changes in how people live and work have contributed to this shift. Social media can also amplify pressure and self-expectations, while the boundaries between work, rest, and personal life have become increasingly blurred.

“Work, social obligations, news, and notifications rarely switch off, keeping the brain in a state of low-grade alertness,” said Asst Prof Ho.

At the same time, many young adults are juggling multiple roles, managing their careers, relationships, and online identities while worrying about broader uncertainties such as finances, housing, or the future. These pressures can quietly drain mental energy, even when life appears stable on the surface.

Lifestyle habits can add to the strain. Later bedtimes, more screen time and poorer sleep quality reduce the body’s ability to recover from daily stress. Over time, fatigue can begin to feel like a normal part of life rather than a warning sign. 

The early warning signs

However, before more serious health issues develop due to stress, the body often sends subtle signals.

Common early signs include poor sleep, feeling unrested the next day, becoming more forgetful, falling sick more easily or feeling persistently lethargic. Some people may also notice themselves dwelling on worries or becoming more easily irritated.

These changes are sometimes dismissed as normal tiredness. But when fatigue begins to interfere with daily life, it may be time to pay closer attention.

“If the tiredness is persistent and affecting daily functioning, such as being unable to work effectively or enjoy hobbies, it may be worth checking out,” said Asst Prof Ho.

Another warning sign is losing interest in activities that once brought enjoyment. In some cases, untreated stress can gradually progress into more serious mood difficulties.

Why stress can affect the whole body

Although stress is often thought of as a mental experience, its effects extend far beyond the mind.

Over time, chronic stress can quietly affect multiple systems in the body, including the heart, metabolism and immune system.

“Chronic stress can affect the body quietly and cumulatively, even in people who appear fit and healthy on the outside,” said Asst Prof Ho.

Even someone who exercises regularly or appears outwardly healthy may still experience the biological effects of prolonged stress. 

These signs, which can include frequent minor illnesses and persistent fatigue, may appear subtle at first. But they can build up over time and, if left unaddressed, may increase the risk of health problems later in life, including conditions such as hypertension, diabetes and other stress-related illnesses. 

Finding a healthier balance

Despite the pressures of modern life, Asst Prof Ho emphasised that small changes can make a meaningful difference, particularly when it comes to rest and recovery.

One of the most important factors is sleep.

“Sleep is essential for both mental and physical health because it supports the body’s core regulatory systems, brain function, emotional regulation, metabolism, immunity, and cardiovascular stability,” he said.

Working out can also help manage stress, but it is not a complete solution on its own.

“Exercise does not fully cancel out chronic stress or persistent poor sleep,” he noted.

Instead, maintaining health requires a balanced approach that includes adequate sleep, regular physical activity, and time for recovery.

Looking out for one another

Crucially, while stress and burnout can feel isolating, support from friends and family can make a significant difference.

As such, Asst Prof Ho encouraged people to create a safe space for loved ones to talk about what they are going through.

“Listening attentively without rushing to give advice or minimise their feelings helps people feel understood,” he said.

Encouraging restorative activities, such as hobbies, exercise or social connection, can also help someone regain energy and perspective. But if stress persists or becomes overwhelming, gently suggesting professional help may help them get the support they need.

Ultimately, the most important step is recognising stress early rather than ignoring it.

“Stress should not be ignored or brushed aside,” said Asst Prof Ho. “It is important to recognise and confront stress early, before it accumulates and affects mental and physical health.”

One simple habit can help: regularly checking in with yourself.

Noticing changes in sleep, mood or energy levels and responding early with rest, boundaries or support, may prevent exhaustion from becoming something deeper.

Because while feeling tired may be common today, it should not have to be normal.