What causes calf muscle soreness?

Prolonged standing, walking, or exercising can overwork the calf muscles, leading to soreness and discomfort. Extended use of the legs causes excessive accumulation of lactic acid in the calf muscles, resulting in muscle acidity and pain. Symptoms typically subside only after the lactic acid is naturally metabolized and cleared. It is recommended to undergo appropriate physical therapy or apply warm compresses to improve local blood circulation, thereby alleviating pain and swelling. Additionally, lumbar spine conditions—such as lumbar disc herniation or lumbar spinal stenosis—that cause nerve root compression or damage may also result in calf muscle soreness.

Calcium deficiency may also contribute to calf muscle soreness. This condition is more common among elderly individuals, as aging is associated with decreased calcium and vitamin D levels, predisposing them to osteoporosis. Supplementing with adequate calcium and vitamin D can help alleviate these symptoms; additionally, regular light exercise—such as walking—and moderate sun exposure are beneficial.

Calf muscle soreness may also arise from varicose veins in the lower limbs. Many occupations require prolonged standing, which can impede venous return in the lower extremities. As a result, blood pools in the veins, causing venous dilation. If thrombosis develops, it may obstruct blood flow, leading to calf pain.