Why do eyes itch when sleepy?

Several factors contribute to itchy eyes when a person is sleepy:

Histamine release: When you are sleep-deprived, your body releases more histamine, a chemical that plays a role in the body's immune response and can cause allergy-like symptoms, including itchy eyes.

Reduced tear production: Sleepiness can lead to reduced tear production, which is essential for lubricating and protecting the eyes. This dryness can cause irritation and itchiness.

Eyelid twitching: When tired, the muscles around your eyes can twitch or spasm, leading to further irritation and itchiness.

Environmental factors: Certain environmental factors, such as allergens, dust, or smoke, can also contribute to itchy eyes, especially when the body's defenses are weakened due to sleep deprivation.

Underlying conditions: In some cases, itchy eyes when sleepy may be a symptom of an underlying medical condition, such as dry eye syndrome or allergies. If the itchiness persists or is accompanied by other symptoms, consulting an eye doctor is recommended.

To alleviate itchy eyes when sleepy, try getting adequate rest, using artificial tears to keep your eyes moist, and avoiding potential irritants in your environment. If the itching is severe or persistent, it's best to consult an eye care professional for proper diagnosis and treatment.