Back pain after two weeks of rib fracture is a normal reaction if the rib fracture is near the back, and usually requires no treatment. If the fracture is caused by local inflammation, the treatment includes medication and physical therapy. 1. Medication: If the pain is caused by local inflammation after rib fracture due to improper treatment, it can be treated by topical medication such as flurbiprofen gel paste, or oral non-steroidal drugs such as lopressor sodium, indomethacin and so on. 2. Physiotherapy: local hot compresses, massage, moxibustion, tuina and other physiotherapy methods can be used to activate blood circulation and remove blood stasis (to promote blood circulation and eliminate blood stasis in the body), and relax tendons and collaterals to alleviate pain symptoms. If the above symptoms are not relieved, go to the hospital to find out the cause of the disease and give targeted treatment under the guidance of the doctor. The above medications should be used under the guidance of a pharmacist and doctor to avoid adverse reactions.