Hi. Thanks for your query. Noted your history and understood your concerns. Green/dark gray lump with multiple black dots and appearing as if coming out of the skin and the part being under the skin indicate the probable cause as viral wart or keratin horn or an infected epidermoid cyst. This can be treated in the following way: Consult a General Surgeon for clinical evaluation, examination. If this is due to viral wart, it can be treated by chemical cautery, electric cautery or surgical excision. Your Surgeon may advise you the proper way or send you to the Dermatologist for further management. Please do not try anything at home.