Dryness underneath may refer to dry skin on the inner or outer vulva in women, or it may refer to dry skin on the surface of the scrotum in men. Whether taking vitamin B2 will relieve this symptom needs to be analyzed on a case-by-case basis. If the dryness is caused by vitamin B2 deficiency, such as damaged vaginal mucosa or scrotal infection, it can be treated by taking vitamin B2, which can usually be more effective. However, self-medication is generally not recommended to deal with it. If there is no vitamin B2 deficiency, blindly using medication will not only not improve the symptoms, but may also delay the treatment and worsen the symptoms. If only due to bad habits, such as smoking, excessive cleaning and other causes of lower dryness, generally do not need to take drugs, change the bad habits can relieve the symptoms. In addition, it may also be due to the patient in a special physiological stage, the use of drugs, or the existence of some hormone secretion abnormalities, caused by the lower side of the dryness, need to clarify the reasons for the targeted treatment. 1, special physiological stage: if the woman is in the delivery, breastfeeding and other special physiological stage, due to the secretion of estrogen abnormalities, the lower side of the dryness of the situation can occur. Generally there is no need for special treatment, when the body hormone levels return to normal, the symptoms can disappear; 2, medication: if you have certain diseases, are taking to inhibit estrogen secretion class, anti-allergic drugs, it may be the drug factor caused by the lower side of the dry. At this time, it is recommended to consult a doctor, by the doctor to determine whether to continue to take medication, or to look for alternative medication; 3, vaginal atrophy: whether it is a decline in estrogen levels or post-menopausal vaginal atrophy, may cause a decrease in secretion, resulting in the lower side of the dryness, at this time you can comply with the doctor’s instructions to take oral medication, supplemental estrogen, so as to alleviate the symptoms; 4, early-onset ovarian insufficiency: there will be a lower side of the dryness. The situation of dryness will also occur, preferably in women who stop menstruating before the age of 40. Clinical oral medication to supplement hormones, including progesterone and estrogen, can also be taken at the same time psychological intervention and other methods to relieve the symptoms; 5, dry syndrome: the pathogenesis of dry syndrome is still unclear, belonging to the autoimmune system diseases, mainly can appear all over the skin, mucous membranes and other parts of the glands secretion is reduced, so the lower side of the dryness is likely to occur. This situation can be under the guidance of professional doctors through glucocorticoids, immunosuppressants and other drugs to alleviate the symptoms.