Sudden brown spots on the arm may be caused by seborrheic keratosis, eczema, flat warts, etc. They can be removed using freezing, laser, topical medication, etc.
1. seborrheic keratosis: most common in the elderly, may be related to sun exposure, chronic inflammatory stimulation, etc., generally do not need to be treated, if necessary, can be frozen, laser, surgical excision and electrocautery and other methods of treatment.
2. eczema: eczema may be the eczema left after the pigmentation spots, usually can gradually fade, usually pay attention to moisturizing, sunscreen.
3. flat warts: most common in children and adolescents, related to HPV infection. It’s a good idea to get a good deal of money for a good deal of time, but it’s also a good idea to get a good deal of money for a good deal of time.
It is recommended to go to the hospital in time to identify the cause of the disease and use medication under the guidance of the doctor.