** 1. DPN [dermatosis papulosa nigra] is a benign [non cancerous] skin condition, having a genetic basis [your father has it], and occurring in dark skin people and since case is diagnosed, which means you are under supervision of Dermatologist. 2. Usually no treatment is required unless it is cosmetically undesirable or psychologically traumatic to the patient. PS. No tests are needed as DPN is diagnosed clinically. If there is any doubt a skin biopsy can be taken. 3. DPN tags are generally best left untreated, since complications of locally applied treatment can include increased and decreased pigmentation, scarring and keloid formation. 4. In Ayurveda we generally adopt [सहज (मांस/मेद/मनोवह स्रोतस ) line of treatment, which you can get after consulting an Ayurveda Physician there. . Apply cashew nut oil, which will irritate it,causing it to fall off. . The milk extracted from the papaya fruit is effective. Apply regularly PS. medications has side effects and surgery has recurrence rate.