There are many types of spots, including chloasma, freckles, seborrheic keratosis, etc. They should be clearly diagnosed and eliminated by general treatment, medication and physical therapy. 1. Melasma: In case of melasma, patients need to apply hydroquinone and other depigmenting agents to treat it on the basis of sun protection, and can also use chemical peeling of fruit acid and other ways to assist in the treatment and enhance the efficacy. For stubborn melasma, laser treatment can be taken, including Q-switched Nd:YAG laser and Q-switched ruby laser catheter. 2. Freckles: Freckles are mainly treated by laser, commonly used ruby laser, emerald green gemstone laser, etc., which can make local pigment particles burst without damaging the nearby tissues and promote the metabolism and absorption of pigment particles. For those with lighter pigmentation, medication can also be used to apply 30% trichloroacetic acid solution to the spots, which can make the local epidermis of pigmentation peel off. 3. Seborrheic keratosis: Seborrheic keratosis is often treated with laser therapy, such as Q-open light laser, strong pulse light, high-frequency electric knife, etc., which can effectively remove spots. For patients with sudden spotting, they should seek medical examination to clarify the type of pigmentation and choose the appropriate way to deal with it.