The treatment of picosecond laser spot removal may cause recurrence for some patients with pigmentation. This kind of recurrence is not necessarily caused by the laser treatment, because many people form recurrence of pigmentation related to their own bad habits, and some people may have recurrence caused by hereditary factors. In case of recurrence, you can either undergo picosecond laser treatment again or take certain medication to relieve the problem. In terms of the choice of medication, you can use hydroquinone cream topical treatment, or take tranexamic acid orally, etc. You can also take oral tonics to regulate the treatment by means of Chinese medicine.