Question: why does someone feels sleepy

Jacinta Nzilani answered on 5 Aug 2025:

Hey,

😴 Why Do You Feel Sleepy?
You feel sleepy because your body and brain need rest. This happens due to:

Adenosine Build-up 🧪
As you stay awake, a chemical called adenosine builds up in your brain. It makes you feel tired and pushes you to sleep.

Circadian Rhythm ⏰
Your body has a 24-hour “biological clock” that tells you when to feel awake or sleepy ,usually sleepy at night.

Melatonin Hormone 🌙
When it gets dark, your brain makes melatonin, a hormone that signals your body to relax and prepare for sleep.

Other Reasons You Might Feel Sleepy:
Not enough sleep the night before

Boring environment

Heavy meals

Illness or medication

Stress or depression