If your arm is still painful one month after HPV, you can use medication and physical therapy. If the pain is more pronounced, you can take oral non-steroidal anti-inflammatory drugs such as ibuprofen or diclofenac sodium to improve the pain symptoms and reduce this sterile inflammation. Because the pain after HPV injection is mainly due to the vaccine, and the immune response caused by the lytic substance in it, this condition can also be treated by using hot compresses or physical therapy to promote blood circulation and try to make the inflammatory response dissipate, which can relieve the painful symptoms in the arm as soon as possible, but if the pain is accompanied by red skin color and increased skin temperature, it is necessary to go to the hospital for further disposal because it may contain infectious components.