Arm pain after HpV vaccination usually takes 2-3 weeks to be significantly relieved due to the solutes in the HpV vaccine as well as the vaccine itself, which can cause an inflammatory response in the subcutaneous as well as intramuscular areas of the injection site, leading to inflammatory cell infiltration and causing related symptoms. If the pain is severe then non-steroidal anti-inflammatory drugs such as ibuprofen or diclofenac sodium can be administered orally to reduce pain and relieve local sterile inflammation. If the specific area of pain is small, topical application of Xylitol can also be used to promote the absorption of inflammation. If there are more obvious conditions such as hard nodules, physical therapy or hot compresses can be used to improve local blood circulation and promote better absorption of inflammation.