Easy to cramp may be related to cold, calcium deficiency, epilepsy and other reasons. 1. Cold: If you stay in a cold environment for a long time, the local muscles will be stimulated by cold, which will easily cause spasm and contraction of the local muscles, and thus may cause cramps. 2. Calcium deficiency: If long-term poor dietary habits, excessive partiality, picky eating, resulting in a lack of nutrients, especially calcium deficiency, resulting in low blood calcium levels, easy to cause muscle spasms, which may cause symptoms of cramps. 3. Epilepsy: Partial seizures can be characterized by involuntary twitching of one side of the limb, which is usually diagnosed with the help of an electroencephalogram. Easy to cramp, may also be caused by other reasons, it is recommended to seek medical treatment as soon as possible, to clarify the cause of the disease, to give targeted treatment and conditioning.