Why Am I Always Tired?
Quick Answer
Untreated allergies can disrupt sleep and cause chronic fatigue — often called 'allergy brain.'
If allergies keep you from breathing well at night, your sleep quality drops — and fatigue follows.
Likely causes
- Allergy-driven poor sleepCongestion fragments deep sleep.
- Antihistamine side effectsOlder antihistamines cause drowsiness.
- Sleep apneaOften overlaps with chronic nasal obstruction.
What to try
- Switch to non-drowsy antihistamines.
- Treat congestion before bedtime.
- Ask about a sleep evaluation if fatigue persists.
When to seek help
- Daytime sleepiness despite 7+ hours of sleep.
- Loud snoring.
- Fatigue impacting work or driving.
FAQ
Can controlling allergies fix fatigue?+
Often yes — better breathing means deeper sleep.