Foot cramps are also known as foot muscle spasms. Frequent foot muscle spasms are usually caused by overwork, cold feet, calcium deficiency, and systemic factors. 1. Overwork: long walks or sports will make the lower limbs overworked, leading to the accumulation of acidic metabolites in the feet, thus causing frequent foot muscle spasms. 2. Cold feet: cold feet can also cause foot muscle spasms, mostly seen in winter or room temperature lower environment. 3. Calcium deficiency: Calcium ion is the main medium responsible for nerve conduction in the human body. If the calcium level in the blood decreases, it will cause the body to become excited due to the abnormal changes in the conduction medium, thus triggering frequent spasms of the foot muscles. 4. Systemic factors: such as rabies, tetanus, epilepsy and other diseases, can also cause frequent foot muscle spasms. In addition, there are many other reasons that can cause frequent foot muscle spasms, if accompanied by other discomforts, it is recommended to go to the hospital in a timely manner to find out the cause of the disease, and then receive treatment as soon as possible.