Varicose veins often cramp at night can be caused by metabolic disorders, inadequate blood supply or low calcium. When varicose veins occur, the pressure in the lumen of the vein increases, which can also cause an increase in the pressure in the small veins between the muscles of the legs, leading to metabolic disorders in the muscles, and the accumulation of metabolic products can stimulate the muscles to cause spasms. The accumulation of metabolic products can stimulate muscle spasm. Poor blood circulation in the legs after varicose veins and insufficient local blood supply can cause cramps. In addition, low calcium ions can also lead to leg muscle contraction disorders and the appearance of cramps. When varicose veins often cramp at night, you can take oral medication under the guidance of a doctor to promote venous blood return to improve vascular permeability and alleviate the progress of varicose veins, and you can also wear compression stockings to improve venous return in the calf. In addition, you should pay attention to avoid sitting and standing for a long time, try to elevate the legs, which can help to promote the venous return, and surgery is also feasible when the condition is serious. When varicose veins cramp at night, you should consult a doctor in a timely manner, under the guidance of a specialized doctor to actively carry out appropriate treatment.