Phellodendron Bark is a traditional Chinese medicine that has been used clinically for the treatment of hair loss with some useful effects. An ethanolic extract of Phellodendron spp. leaves, or a liquid decoction of Phellodendron spp. leaves with complementary drugs, can usually be applied topically to people with hair loss to relieve the symptoms of hair loss. According to Chinese medicine, freshly chopped Phellodendron leaves can be soaked in alcohol and filtered to obtain an ethanolic extract of Phellodendron leaves. The ethanolic extract of Phellodendron spp. can then be applied to localized hair loss areas to promote localized vasodilation of the scalp, increase blood circulation and improve cellular nutrients, thus reaching the goal of stimulating hair follicle growth. In addition to topical application of ethanolic extract of Phellodendron sinensis leaves, Chinese herbalists can also decoct a mixture of raw Phellodendron sinensis leaves, safflower and angelica, which can also have hair growth effects when applied topically. Studies have proven that the flavonoids contained in Phellodendron leaves can activate hair cells and help restore declining hair follicles, which can stimulate hair follicle growth and achieve hair regrowth again. In addition to flavonoids, cypress leaves also contain tannin and volatile oil, which can be applied topically to inhibit bacterial growth and play an anti-inflammatory and dandruff removal role. However, the effect of herbal medicine is limited, and it can usually relieve the symptoms of hair loss. In serious cases, it is necessary to consult a doctor and apply medication under the guidance of a doctor, or to improve the adverse effects of hair loss through hair transplantation.