17 year old boy shoulder mole suddenly pain blackening how to do

17 years old boy shoulder black mole sudden pain black consider the possibility of melanoma.
The cause of nevus is unknown, may be related to heredity and developmental defects, mostly manifested as a regular border, clear boundaries, small diameter of the rash, no other uncomfortable symptoms, if the nevus appeared sudden pain, to consider the possibility of melanoma. If the nevus has sudden pain, it should be considered as melanoma. It is mostly a tumor deteriorating from melanocytes, and it mainly manifests itself as the enlargement of the original nevus, bulging, itching, pain, ulceration and other symptoms.
If the nevus has pain and other symptoms, it is necessary to consult a doctor in time to identify the cause of the disease and take treatment to avoid delaying the condition. In daily life, it is necessary to pay attention to not scratching the affected area, avoiding sunlight, exercising appropriately, and conducting regular checkups to monitor the changes of the condition.