Why Am I So Tired All the Time? Understanding Ongoing Fatigue and When to Have It Checked | 4 min read

You are not the only one feeling this way

There is a particular kind of tiredness that sleep does not seem to fix. You go to bed at a reasonable hour, you get your seven or eight hours, and you still wake up feeling like you never rested at all. If that sounds familiar, you are not alone.

The 2025 Sloom National Sleep Census, released in March 2026 and based on responses from more than 5 600 people across all nine provinces, found something researchers have described as a national sleep paradox. On paper, most South Africans are doing fine: 57.6% report sleeping the recommended seven to nine hours a night. But only 15.1% say they wake up feeling genuinely refreshed, and one in six say they wake up feeling drained. The hours are there. The recovery is not.

The census also gave some insight into why. Nearly half of respondents, 49.8%, said stress keeps them awake at night. More than half, 55.8%, pointed to physical discomfort as their biggest sleep disruptor, and 84.6% said pain affects their sleep at least occasionally. Adults aged 46 to 55 recorded the lowest average sleep quality scores of any age group.

When tiredness is more than a busy season

Most of us explain away ongoing exhaustion. It is the time of year. It is work. It is the kids. Sometimes that is exactly right, and a proper break sorts it out. But persistent fatigue is also one of the most common early signals that something measurable is going on in the body, and it is worth knowing what those possibilities are.

Some of the most frequent medical contributors to ongoing low energy include:

• Iron deficiency or anaemia affects how efficiently oxygen is carried around the body.
• Low vitamin D or vitamin B12, both of which play a role in energy production at cellular level.
• An underactive thyroid, which slows metabolism and can cause sluggishness, sensitivity to cold and unexplained weight changes.
• Disrupted cortisol rhythms from prolonged stress, which can leave you flat during the day and wide awake at night.
• Undiagnosed or poorly controlled conditions such as diabetes, sleep apnea, depression or anxiety.

The point is not to alarm anyone. It is that several of these are common, straightforward to test for and very treatable once identified. You cannot tell them apart by how you feel, because they all feel roughly the same from the inside: tired.

Burnout is also part of this picture

Alongside the physical causes, burnout has become a significant health conversation in South Africa. The World Health Organization defines burnout as a syndrome resulting from chronic workplace stress that has not been successfully managed, and its hallmarks are chronic fatigue, emotional exhaustion, reduced productivity and a growing sense of detachment.

Local contributing factors are well recognised: economic pressure, long working hours, job insecurity and what is often called digital overload, where constant email, WhatsApp and social media notifications make genuine rest difficult. Physical symptoms frequently accompany it, including headaches, body pain, poor sleep and getting sick more often than usual.

Burnout and a medical cause of fatigue can also exist at the same time, which is another reason a proper consultation is more useful than guessing.

Practical things that genuinely help

• Protect a wind-down period. Limit work communication after hours so your nervous system gets a signal that the day has ended.
• Aim for consistency rather than catch-up. A regular sleep and wake time supports your body clock better than sleeping in on weekends.
• Look at your sleep surface. The census found a notable gap in sleep quality between people on newer mattresses and those on mattresses older than twenty years.
• Move, but gently. Regular moderate activity improves sleep quality, while intense late-evening exercise can work against it.
• Watch caffeine and alcohol timing, both of which fragment sleep even when they help you fall asleep.

When to see a doctor

Book a consultation if your tiredness has lasted more than a few weeks, if it is not improving with rest, or if it comes with any of the following: unexplained weight change, shortness of breath, persistent low mood, dizziness, heavy periods, or a sense that you are simply not functioning the way you used to.

A consultation usually starts with a conversation about your history and symptoms, and often includes basic blood work. A routine blood panel can check iron stores, thyroid function, vitamin levels, blood sugar and more, which is frequently enough to identify what is driving the fatigue or to rule out the common causes with confidence.

Either outcome is useful. Knowing is better than wondering.

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