There is no such thing as the fastest way to relieve arm muscle pain. If it is caused by keeping a position for a long time, strenuous exercise, overwork, etc., you can relieve the symptoms through rest, hot compresses, medication and other methods. 1. Rest: First of all, pay attention to rest, keep braking, avoid exercise, aggravate the pain symptoms. 2. Hot compress: you can take a hot towel or hot water bag, on the painful parts, hot compress, can promote local blood circulation, accelerate the body’s metabolism, relieve pain symptoms. 3. Medication: If the pain is severe, you can take non-steroidal anti-inflammatory drugs such as ibuprofen, diclofenac sodium, meloxicam, etc., which can help anti-inflammatory, analgesic, and relieve pain symptoms. All of the above medications should be used under the guidance of a doctor, and should not be used blindly on their own to avoid adverse effects.