Women with dark knees may be caused by localized melanin deposition, if there is no other adverse reaction, do not worry too much. Usually pay attention to bathe frequently, keep the skin clean and hygienic. If the situation is serious, you can go to the hospital for laser ablation surgery to relieve the symptoms. When bathing in the hot summer, it is best not to forget to wash the knee area. Women’s local blood circulation is not good, may also lead to the formation of black blood, you can take a hot towel in the affected area for hot compresses, to promote blood circulation can alleviate the situation of black knees. At the same time with the doctor oral, vitamin C for treatment. You can also apply vitamin E ointment locally for treatment, and during this period of relaxation do not have too much pressure!