Flat warts can be treated with laser or freezing, both of which have their own advantages and disadvantages, and there is no such thing as which one is better. The actual warts are a common clinical skin disease, caused by human papillomavirus infection, local benign superfluous organisms, mostly seen in the face and neck, shoulders and back, if the long-term not cure, may recur. 1. Freezing treatment: Freezing treatment is through liquid nitrogen freezing, low temperature kills cells, so that flat warts gradually necrosis, off. Cryotherapy usually requires multiple treatments and may cause significant pain or skin discoloration. However, it may cause scarring after treatment, and is not suitable for patients with large lesions or extensive fusion; it is not suitable for younger age and special location of lesions. 2. laser treatment: laser treatment is to use the heat of the laser to report the superfluous organisms caused thermal damage, so that flat warts necrosis off. The laser treatment is faster and can remove the lesions in a short period of time. The laser treatment is only suitable for smaller warts. If you have a sudden flat rash, warts growing in size, symptoms continue to be unrelieved, itching, or the number of warts increases, it is recommended that you go to the dermatology department of a regular hospital in a timely manner. The specific treatment should be based on the opinion of the specialist.