Reactive arthritis is an acute non-suppurative arthritis secondary to infection in other parts of the body, with intestinal and urinary tract infections being the most common. In recent years, numerous studies have demonstrated that Streptococcus b haemolyticus infection is also closely associated with the development of reactive arthritis. Blood sedimentation and C-reactive protein may be significantly increased in the acute phase of reactive arthritis, and routine blood tests may show increased white blood cell and lymphocyte counts or mild anemia. Most patients with reactive arthritis have a good prognosis, with the disease lasting from a few weeks to a few months. With prompt treatment, patients usually recover completely. However, the disease has a tendency to recur and timely elimination of the source of infection is necessary to achieve a good outcome. For acute attacks of reactive arthritis, Chinese medicine can identify the cause as fire and heat, which can easily stagnate qi and blood and burn yin and fluids, so Chinese medicine treatment should focus on clearing heat and detoxifying blood, nourishing yin and activating blood.