Dizzy, Headache and Tired: What to Know

Fluid loss can cause headache, weakness, thirst, and light-headedness; [Dehydration](/conditions/dehydration/) is more likely after sweating, vomiting, diarrhoea, or limited drinking. A blocked or runny nose may occur with [Common Cold](/conditions/common-cold/), [Allergic Rhinitis](/conditions/allergic-rhinitis/), or [Chronic Sinusitis](/conditions/chronic-sinusitis/). Fever, aches, or a new loss of smell may point towards infection such as [COVID-19](/conditions/covid-19/). Heat exposure and prolonged worry can worsen fatigue and balance symptoms. The combination does not identify one cause without examining the timing and associated signs.

Rest in a cool, quiet place, drink water regularly, and rise slowly. Eat a light meal if you have missed food. Reduce screen glare and avoid alcohol, strenuous exercise, driving, and heights while dizzy. Keep a brief record of sleep, fluids, temperature, medicines, headache location, and triggers. If congestion is present, gentle saline rinsing may help some people; use only products suitable for you and follow their instructions.

Seek emergency help for a sudden severe headache, fainting, confusion, seizure, stiff neck with fever, new weakness, trouble speaking, vision loss, or difficulty walking. Get prompt medical advice if symptoms follow head injury, continue despite rest and fluids, or come with persistent vomiting, high fever, or worsening drowsiness. A clinician can assess hydration, blood pressure, neurological signs, medicines, and infection.

Ask which features matter most: when the symptoms began, whether the room spins or you feel faint, where the headache is, and whether sleep, heat, congestion, fever, or medicines are involved. Bring your symptom record and list of regular treatments.