The causes of foot cramps are as follows: First, plantar muscle damage: for example, when performing strenuous physical activities, like playing basketball, soccer, sprinting, it is very easy to cause strains in the plantar muscles, especially in the case of strenuous activities without adequate preparation, the chances of injury are even higher. When the plantar muscles are injured, the muscles will be spasmodic contraction, often with spasmodic pain and cramps in the soles of the feet. Second, calcium deficiency: calcium ions can inhibit the excitability of the neuromuscular junction, when calcium deficiency, the excitability of the neuromuscular will increase, so it is very easy to cause hand and foot cramps. Adults often show spasmodic pain in the calf gastrocnemius and spasmodic pain in the foot, that is, calf cramps and plantar cramps.