Lateral right ankle pain can be related to trauma, arthritis, nerve compression and other causes. An accidental fall while walking can cause a broken ankle, which may result in injury to the lateral ligament of the ankle joint, which can cause lateral ankle pain, swelling, and limited mobility. In severe cases, a fracture of the base of the fifth metatarsal can result, which can also cause severe pain. Ankle arthritis such as traumatic arthritis, osteoarthritis, rheumatoid arthritis, etc. can also cause lateral ankle pain when the inflammation is more severe. When the common peroneal nerve is compressed, the nerve functions abnormally, which may also manifest as lateral ankle pain. If lateral pain in the right ankle occurs, it is recommended that the patient go to the hospital for a complete examination and treatment of the cause.