If you are 30 years old and have spots on your hands, consider that it is related to seborrheic keratosis, flat warts, post-inflammatory hyperpigmentation and other factors, and different conditions correspond to different treatment programs. 1. seborrheic keratosis: also known as age spots, consider and ageing, skin aging and heredity, etc. After diagnosis, you can cooperate with the doctor to choose frozen or photoelectric treatment, so as to get rid of local pigmentation spots. 2. Flat warts: These are caused by human papilloma virus infection, which may spread through direct or indirect contact with the affected area of the patient. After the diagnosis, you can cooperate with the doctor to use salicylic acid and retinoic acid cream, so as to promote the epidermal stripping to play a therapeutic role; you can also consider photoelectric treatment, and if necessary, you can choose the way of surgical excision. 3. Post-inflammatory hyperpigmentation: the spots on the hands of some patients may be post-inflammatory hyperpigmentation, which is considered to be related to the stimulation of trauma and sun exposure, generally no special treatment is needed, and we can wait for it to heal by itself, or we can choose the intervention of laser. It is recommended that patients 30 years old after the appearance of spots on the hands, should go to a regular medical institutions, after a clear diagnosis combined with their own situation, to give the corresponding treatment, not blind treatment.