Feet have been cramps should be based on different reasons to take different ways to relieve, common causes are fatigue, calcium deficiency, blood clots, etc., commonly used ways to relieve attention to warmth, calcium, medication and so on. 1. Fatigue: If a lot of exercise or labor during the day, causing muscle tension, metabolites can not be metabolized in a timely manner, may stimulate the muscles of the lower limbs, causing cramps in the legs and feet. Generally, it can be relieved after enough rest. 2. Calcium deficiency: Calcium deficiency can cause lower limb cramps, especially at night. You should pay attention to eat more food with high calcium content, or take calcium supplements as appropriate. 3. Thrombosis: If there is a deep vein thrombosis in the lower limbs, if you keep a certain posture for a long time which leads to pressure on the legs, causing the blood return to be blocked and stagnated in the legs, it will cause leg and foot cramps. It can be treated with medication such as heparin, or surgery if the condition is severe. All of these medications should be used under a doctor’s supervision. Foot cramps can also be caused by other reasons. If the cramps cannot be relieved or are frequent, you should go to the hospital to find out the cause and get targeted treatment.