Symptoms of peroneal longissimus muscle injury include local soft tissue swelling, pain, pulling pain during joint movement, and dysfunction of walking, plantarflexion, and valgus. Fibularis longus muscle starts from the upper 2/3 of the lateral surface of the fibula, fibularis shortus muscle starts from the lower 1/3 of the lateral surface of the fibula, and stops at the 5th metatarsal tuberosity, its main function is to plantarflex the ankle joint, and to make the foot turn over, so when the fibularis longus muscle is injured, there will be the swelling and pain of the posterior lateral side of the lower leg, and the pain is obviously aggravated when walking, plantarflexing, and turning over of the foot, and there will be the muscle tenderness of the affected side on palpation. Fibula long and short muscle injury, treatment is generally given to local braking, local external physiotherapy, promote local blood circulation, pain is obvious can also be given to diclofenac diethylamine latex topical, can play an anti-inflammatory and analgesic effect. If the above symptoms occur, it is recommended to go to the hospital in a timely manner, complete the relevant examinations, and follow the doctor’s instructions for standardized treatment after a clear diagnosis, so as not to delay the condition.