“My child has recently started blinking frequently and forcefully, like making a face, it’s especially ugly, and it’s useless to talk about it!” — We often encounter parents like this in the clinic, and if they take another look at their child at this point in the interval of talking, the child is there blinking on again. Many parents think that this is a bad problem that their child has learned, but in fact, if you look into it, it’s because there is something wrong with the eyes. Children have poor presentation skills and are often unable to say what is wrong with their eyes. Clinically, blinking usually has the following causes: 1. Allergic conjunctivitis: this is the most common, children often have allergic constitution, usually also combined with allergic dermatitis, allergic rhinitis and other diseases. The clinical manifestations of allergic conjunctivitis are eye itching, eyelid edema and eye redness after the child has been exposed to an allergic substance, sometimes with significant episodes and rapid eye swelling after eye rubbing. Physical examination reveals enlarged lid conjunctival papillae with follicles, and spot-like epithelial erosions are seen in the stained lower cornea. Also, some allergic conjunctivitis has typical manifestations, such as yellowing of the bulbar conjunctiva lid conjunctiva and unclear vascular pathways. Anti-allergic eye drops are used three to four times a day, and growth factor eye drops can be added to promote repair in cases of combined corneal epithelial damage. Anti-allergic eye drops are usually: (1) for mild symptoms, artificial tears are used to stabilize the microenvironment of the eye surface; (2) for severe itching, corticosteroid eye drops are used, which are effective and can be used for a short period of time to rapidly improve symptoms; (3) antihistamines (emetine fumarate) or mast cell stabilizers (sodium cromoglycate) are used mostly before the onset of allergic symptoms; (4) for severe cases, systemic anti-allergic drugs are added, such as paracetamol, etc. Allergic conjunctivitis is usually recurrent as the child will have an attack when he/she encounters the allergen. Because of the wide variety of allergens, it is very difficult to screen them out and the clinical treatment of allergic conjunctivitis is somewhat restrictive and can only temporarily control the symptoms. Children can reduce the frequency of attacks by strengthening exercise, balanced nutrition and enhancing their resistance. 2, bacterial or viral conjunctivitis: the child has red eyes, increased yellow eye stool, foreign body sensation in the eye, physical examination reveals: conjunctival congestion with follicles or papillae, and sometimes small yellow-white stones are visible. Treatment: Antibiotics or antiviral eye drops are ordered. 3. Astigmatism: In addition to blinking, children often tilt their heads when watching TV. 4. Inverted eyelashes: The lower eyelashes of the child are turned inward and rub the cornea and conjunctiva, causing itchy eyes and tears. For children under 3 years old with soft eyelashes, the shape of the lower eyelids can be corrected by massage (pulling with the thumb from the inside to the bottom of the lower eyelids). 5. Tic disorder: This is a neurological disorder in which the child blinks with a combination of mouth movement and facial muscle movement.