Heel soreness can be caused by over walking, plantar fasciitis, Achilles tendonitis and trauma. 1. Excessive walking: Excessive walking or standing for a long time can lead to strain on the plantar muscles and other tissues, or accumulation of lactic acid in the local muscles, causing heel soreness and swelling, which can be relieved after resting. 2. Plantar fasciitis: aseptic inflammation of plantar tendon or fascia. The main symptom is heel pain and discomfort, and the pressure point is often in the position of the plantar foot near the heel. It is mainly caused by women wearing high heels, standing and walking for a long time, which results in high pressure on the muscles and fascia of the foot. 3. Achilles tendonitis: The cause of Achilles tendonitis is often due to strenuous exercise, resulting in tearing, injury, calcification, resulting in reduced elasticity of the Achilles tendon, which leads to the formation of Achilles tendonitis. 4. Trauma: mainly due to walking and standing for too long, external mechanical collision, contusion and sprain and other reasons, caused by the heel muscle and soft tissue injury, and cause localized swelling and pressure pain in the heel. There are other causes of heel pain and swelling, if rest does not relieve, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, follow the doctor’s instructions to give targeted treatment, so as not to delay the condition.