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Why Am I Always Tired? Common Causes of Fatigue

14 May 2025

Are you constantly feeling drained, no matter how much sleep you get? Fatigue is one of the most common concerns raised with doctors, and it’s often more than just needing a nap. Whether it's physical exhaustion, mental burnout, or a mix of both — ongoing tiredness can be your body’s way of saying something needs attention.

Everyday Causes of Fatigue

Sometimes, the answer is simpler than we expect. Common lifestyle contributors to feeling tired include:

Poor sleep habits – Inconsistent bedtimes, screen use at night, or undiagnosed sleep issues.

Poor diet – Low iron, B12 or general nutritional deficiencies can impact energy levels.

Dehydration – Not drinking enough water can cause you to feel sluggish.

Lack of exercise – Movement boosts energy. A sedentary lifestyle may be zapping your stamina.

Stress and burnout – Mental overload can manifest as physical exhaustion.

Could It Be Something More?

  • If fatigue lingers despite rest and healthy habits, it could signal an underlying condition. Some possibilities include:

  • Iron deficiency or anaemia

  • Thyroid issues (like hypothyroidism)

  • Depression or anxiety

  • Chronic fatigue syndrome

  • Diabetes

  • Sleep disorders such as sleep apnoea

When to See a Doctor Online

It’s worth seeing a doctor if your tiredness:

  • Has lasted more than 2 weeks

  • Is interfering with daily life or work

  • Comes with other symptoms (e.g. weight changes, mood changes, brain fog, low motivation, etc.)

  • Doesn't improve with better sleep, nutrition, or rest

With Our Sage Telehealth, you can speak to an Australian doctor from 7am–11pm AEST, 7 days a week — no matter where you are. Our doctors can:

  1. Order blood tests to investigate underlying causes

  2. Provide medical certificates if fatigue affects your ability to work

  3. Offer referrals to specialists if needed

Tiredness shouldn’t be your new normal. A quick online consultation can help you get answers and a plan of action.

Book a telehealth appointment today with Our Sage — and get back to feeling like yourself.

Book here now.