When there is an expansion of alopecia areata, local injections of corticosteroids can be used. The treatment with corticosteroids is a kind of occlusive therapy, primarily involving injecting corticosteroids into the area of hair loss. This can suppress inflammation and immune responses around the hair follicles, enabling hair growth and potentially preventing the expansion of alopecia areata.

However, some individuals may experience localized skin atrophy after corticosteroid injections, and some may experience depigmentation. Therefore, when alopecia areata is expanding, it is advisable to seek timely treatment at a dermatology department in a reputable hospital.

Under the guidance of a doctor, treatment can include topical application of minoxidil solution, or the use of compound preparations like compound styradan tonic for hair growth, as well as oral medications such as cysteine tablets, compound glycyrrhizin capsules, and treatment based on Traditional Chinese Medicine diagnosis and differentiation.