Serious pigmentation after one month of picosecond spot removal can be improved by strengthening sun protection, medication, medical treatment and nursing care. 1. Strengthening sun protection: after the operation of picosecond spot removal, the skin is in the recovery period, and it is easy to aggravate facial pigmentation when exposed to excessive ultraviolet rays, so the patients should pay attention to strengthening sun protection measures. For example, when you go out, you can use sun hat, umbrella, mask, sunglasses, sunscreen, sunscreen spray and other sunscreen items to help isolate the UV damage. 2. Medication: For patients with relatively mild pigmentation after one month of picosecond spot removal, local application of vitamin E ointment, vitamin C ointment and other ointments can help facial skin repair, thus helping facial skin to accelerate the discharge of internal pigmentation and effectively improve the phenomenon of pigmentation after picosecond spot removal operation. 3. Medical treatment: For patients with heavy pigmentation and no improvement after a long time of medication, they can be repaired by photoelectricity treatment, water light injection and other medical methods, which can promote the absorption of local pigment particles through the photothermal effect produced by laser. 4. Strengthen care: In the process of the above treatment, we should pay attention to strengthen the facial skin care, so as to help effectively improve the pigmentation after the operation of picosecond removal, such as: strengthen the hydration and moisturizing, avoid spicy and other stimulating foods, pay attention to let the scabs fall off on their own, and do not excessively rub the facial skin and so on. The above treatments should be carried out in regular medical institutions under the guidance of specialists.