There are many reasons why the eyes always blink, such as overuse of the eyes, conjunctivitis, tics, and mimicry behavior. 1. Overuse of eyes: Eyes that feel strained during use will show frequent blinking behavior. When the eyes are overworked, such as by lack of sleep or dysfunctional tear glands, the eyes are left in a state of chronic soreness and pain, which eventually leads to frequent blinking to rest. 2. Conjunctivitis: frequent blinking behavior may be due to the presence of eye inflammation, especially on behalf of conjunctivitis, when the eyes are infected with conjunctivitis, often lead to conjunctival congestion, while increased secretion, often accompanied by dryness and pain, itching symptoms. Patients often blink involuntarily to relieve the symptoms. 3. Tourette’s syndrome: If you keep blinking, it may be due to Tourette’s syndrome. Tourette’s syndrome is a clinically visible disorder characterized by uncontrollable twitching of certain parts of the body. It usually shows frequent blinking during its development. At the same time, certain parts of the body may also tic. 4. Imitative behavior: Frequent blinking may also be due to imitation. Most of the blinking is due to personal habits, through imitation of others, especially children are more likely to have this symptom. Eyes always blinking, if not relieved after rest, it is recommended to consult a doctor.