First, read the English article below.

Muscle cramps can cause severe pain in your lower legs by causing your muscles to suddenly contract. A sudden, intense cramp or spasm in your lower leg is sometimes called a “charley horse.” While these cramps can be extremely painful, they usually go away on their own or with minimal treatment. The symptoms of a charley horse include:  Hard, tight calf muscles Sudden, sharp pain in the muscles “Lump” or bulge in the muscles Muscle cramps and spasms tend to go away fairly quickly. You can speed this recovery process by stretching and using heat (or cold).  Stretch your affected calf muscle. You can do this by putting your weight on the leg that is cramping. Bend your knee slightly. Alternately, you can sit with your affected leg stretched out in front of you. Use a towel to gently pull the top of your foot towards you.  Apply heat. Use a heating pad, hot water bottle, or warm towel to relax the cramping calf muscle. Taking a warm bath or shower may also help. Apply ice. Massaging your calf with an ice or cold pack may help relieve the cramp. Apply ice for no longer than 15-20 minutes at a time, and always wrap the ice pack in a towel to prevent frostbite. Tendinitis is caused by an inflammation of a tendon, one of the thick, Rope-like “cords” that connects your muscles to your bones. Tendinitis can happen anywhere you have tendons, but it commonly occurs in elbows, knees, and heels. Tendinitis can cause pain in your lower calf or heel. The symptoms of tendinitis include:  Dull, aching pain that is worse when you move the joint A feeling of “crunching” or grating when you move the joint Tenderness or redness Swelling or lumps Treatment of tendinitis is usually simple: rest, take over-the-counter painkillers, ice the affected area, use compression bandages, and elevate the affected joint. A strained soleus muscle is less severe than a strained or torn gastrocnemius. This injury often happens in athletes such as daily or long-distance runners. Usually, strains to this muscle include the following symptoms: ... 

Now, please write a short abstract for it in Chinese. Abstract:
判断肌肉痉挛的症状。 治疗肌肉痉挛。 判断肌腱炎的症状。 治疗肌腱炎。 判断比目鱼肌拉伤的症状。 判断跟腱断裂的症状。 确定跟腱断裂或撕裂的风险因素。