Hydration and focus

That afternoon fog you can't quite shake might have a simple explanation - you may just need a glass of water.

What it is

The brain is made up largely of water, and even mild dehydration - well before you feel thirsty - can affect concentration, memory, mood and alertness. Many of us go through the workday under-hydrated without realising it, especially when busy, stressed, or relying heavily on caffeine, which has a mild diuretic effect. Staying properly hydrated is a simple, often overlooked way to support mental clarity and steadier mood.

Signs to notice

• Headaches, especially in the afternoon
• Difficulty concentrating or a sense of mental fog
• Fatigue that doesn't match your sleep or workload
• Irritability or low mood without an obvious cause
• Dark yellow urine or infrequent urination
• Dry mouth, dry skin, or feeling unusually thirsty

What helps

• Keep a water bottle at your desk or workstation as a visual reminder to drink
• Aim to drink water consistently through the day rather than large amounts at once
• Set reminders if you tend to forget, especially during busy or stressful periods
• Eat water-rich foods like fruit, cucumber and soup, which contribute to hydration too
• Notice if caffeine or alcohol intake is increasing your fluid needs
• Pay extra attention on hot days or when exercising, as fluid needs increase
• Use thirst and urine colour as simple, practical guides rather than obsessing over exact amounts

When to reach out for help

If fatigue, poor concentration or headaches persist despite good hydration, sleep and nutrition, it's worth seeing a doctor to rule out other causes. If stress or anxiety seem to be driving fatigue and fog, a counsellor can help you address the underlying pressure.

Getting help in South Africa

Cleared Mind counsellors can help you build sustainable daily habits that support focus and wellbeing. Speak to your GP if physical symptoms persist. For general mental health support, contact the SADAG Mental Health Line on 011 234 4837.