Nail melanoma is a tumor that is caused by malignant transformation of melanocytes, with high malignant degree, and the main symptoms include rapid enlargement of the original nevus, satellite foci, and metastatic symptoms of the tumor, etc. Specific symptoms can be divided into early symptoms, mid-term symptoms, and late symptoms. 1. Early symptoms: Nail melanoma is a tumor that comes from the malignant transformation of melanocytes, with high degree of malignancy. Early melanoma will show symptoms such as rapid enlargement, bulging, shape or color change of the original nevus, and when it is serious, itching, bleeding and other symptoms may also appear. 2. Mid-stage symptoms: with further development of the disease, melanoma will have symptoms such as satellite foci, ulcers, repeated non-healing and so on. 3. Late-stage symptoms: tumor metastasis will appear in late-stage melanoma, and the symptoms will be different in different parts of metastasis. If bone metastasis occurs, the symptoms of bone pain will appear. If lung metastasis occurs, cough, hemoptysis and other symptoms will appear. If the above symptoms occur, it is recommended to go to the hospital in time to do relevant examination and receive targeted treatment from doctors.