FGF2 and Oral ulcer: To put it in a nutshell, recombinant human basic fibroblast growth factor combined with ranitidine is a relatively safe therapy for the treatment of recurrent oral ulcers, leading to various benefits such as significantly reducing the level of inflammatory factors, ameliorating the immune function of patients, reducing the degree of inflammatory response and pain symptoms of patients, and improving clinical efficacy, which is worthy of clinical promotion and application.