Secretions can be categorized into vaginal secretions, nasal secretions, skin secretions, etc. They generally refer to fluids secreted by local organs. 1. Vaginal secretion: vaginal secretion usually refers to female leukorrhea, which is mainly composed of a mixture of fluids such as cervical canal secretion, endometrial gland secretion, and vaginal mucosal exudate. General vaginal discharge is leukorrhea paste or egg white, small amount, no fishy odor. In addition, due to changes in estrogen levels during ovulation, women will have an increase in leukorrhea, leukorrhea transparent egg-white-like performance. 2. Nasal secretion: Nasal secretion is caused by nasal mucosa secretion of watery secretion, it may also be caused by brain trauma or tumor resulting in cerebrospinal fluid outflow from the nasal cavity. 3. Skin secretion: the common secretion of skin is sweat or oil, usually in a hot environment or emotional excitement, there will be increased secretion of sweat and skin oil. Patients who have abnormal changes in secretions need to consult a doctor in time, and follow the doctor’s instructions to choose the appropriate measures according to the specific circumstances of the treatment.