Brown spots on the body need to be judged by the doctor, it may be due to congenital genetic factors caused by coffee spots, or fungal infection caused by lichen planus, or other factors caused by hyperpigmentation. Coffee spot is caused by congenital genetic factors, it may be simple pigmentation abnormal change, or it may be one of the early manifestations of some hereditary diseases such as neurofibroma, to remove it, you can consider laser removal. If infected with Malassezia, this bacterium belongs to the fungus, after infection, there will be multiple brown plaques, spots, treatment is recommended to apply topical antifungal cream, commonly used antifungal cream has ketoconazole cream and so on. If due to skin inflammation caused by brown patches belong to the post-inflammatory hyperpigmentation, these brown patches can fade naturally, probably need about half a year, if half a year later can not fade, you can use laser treatment. Long brown spots may have other causes, it is recommended to consult a doctor in a timely manner, under the guidance of the physician treatment.