Sudden Achilles tendon pain without exercise is likely to be caused by Achilles tendonitis. For patients with Achilles tendonitis, they should wear loose and comfortable shoes, avoid long hours of standing and walking, and pay attention to the combination of work and rest. Alternating upper and lower limb activities can reduce local fatigue, and overloaded parts should also be given timely rest and relaxation. Every night before going to bed, you should soak your feet in hot water for about 15-20 minutes to promote blood circulation in the muscles, ligaments and joints of the lower extremities, especially the ankle joint, to prevent the occurrence and further aggravation of periarthritis of the Achilles tendon. For this condition that has already appeared, you can consider giving drugs to activate blood circulation, disperse blood stasis and relieve pain for treatment. Commonly used topical medications include Shu Ning paste, which can achieve many effects such as promoting blood circulation, regulating qi, removing blood stasis and relieving pain, and dispelling evil and supporting righteousness, which can effectively stop the pain, promote blood circulation and accelerate tissue repair. Chinese herbal lotions can also be applied for fumigation, which is also very effective for gradual recovery. Local physiotherapy, massage, acupuncture and moxibustion can also achieve the effect of relief. Oral non-steroidal anti-inflammatory drugs can also be considered to relieve pain when the pain is obvious. In addition, for patients whose conservative treatment is ineffective, surgery can be performed to remove the severe tissues surrounding the Achilles tendon to achieve relief.