Vitamin B2 deficiency can generally be discontinued after about 1-2 weeks of oral administration, but depending on the specific clinical symptoms, the course of treatment can be extended or shortened as appropriate. Vitamin B2 is a water-soluble vitamin, commonly known as riboflavin. It is essential for maintaining the integrity of human skin, the integrity of mucous membranes, and the stability of cell membranes. Vitamin B2 clinical deficiency can cause a number of diseases, such as the most common mouth ulcers, stomatitis, and hair loss. However, too much vitamin B2 supplementation can also cause certain problems, such as causing some symptoms like neurosensitivity, which commonly include tingling and burning sensation, so it is not easy to take too much. In general, for mild deficiency of vitamin B2, it is not recommended to take drugs, and it is enough to eat more foods rich in vitamin B2, such as animal offal, dairy products and soy products. If the deficiency is partial or the symptoms are more severe, oral medication can be considered for supplementation.