Nail edge cracking can be caused by chemical irritation, eczema, fungal infection, etc. Treatment can be taken according to different causes. 1. Chemical irritation: contact with chemicals such as laundry detergent and dishwashing detergent can irritate the skin around the nail and cause the cuticle to crack, which can be alleviated by avoiding contact with the above chemicals. 2. Eczema: the above symptoms may also occur, accompanied by pain, peeling, itching, etc. It can be treated by avoiding suspected allergens and using dexamethasone cream as prescribed by the doctor. 3. Fungal infections: can cause ringworm, which can lead to the above symptoms, and can be treated with ketoconazole, terbinafine and other drugs. In addition, we should also exclude other causes of nail edge cracking symptoms, it is recommended to further to the hospital to avoid delaying the condition.