Toe cramps may be caused by calcium deficiency, or by strenuous exercise, or by factors such as lumbar disc herniation. 1. Calcium deficiency: when calcium ions in the body drop, it will lead to increased neuromuscular excitability, which will cause overstretching of the muscles, resulting in muscle spasms and cramping symptoms. 2. Strenuous exercise: Strenuous exercise of the calf or foot may cause muscle spasm in the foot and lead to toe cramps. 3. Lumbar disc herniation: after the lumbar disc herniation occurs, it will compress the sciatic nerve around, and the sensory abnormality and dysfunction of the innervated area will occur, which may cause toe cramps. In order to relieve toe cramps as soon as possible, it is recommended to go to the hospital in time to find out the cause of the problem and take active treatment.