Sudden cramps in the calf clinically generally refer to spasms of the calf muscles, which may be caused by excessive exercise or due to calcium deficiency. The treatment includes physical therapy, medication and so on. 1. Excessive exercise: too much exercise may lead to the symptoms of calf muscle spasm. Patients first need to stop the activity, and secondly, they can perform reverse stretching and massage on the calf area to relieve the continuous spasm. 2. Calcium deficiency: Calcium deficiency due to various reasons may also cause symptoms of calf muscle spasms. Calcium deficiency patients should firstly avoid cold and humid environment stimulation; secondly, they can take oral vitamin D, calcium lactate and other drugs to replenish calcium; patients with persistent spasticity can take ethylpiperidone hydrochloride, chlorzoxazone and other drugs to alleviate the persistent state of spasticity. If the patient’s symptoms of calf cramps are not relieved, or accompanied by other symptoms, you should go to the hospital in time to see a doctor to identify the cause of the problem and then give targeted treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.