A sudden hardening of the calf muscles is the occurrence of a muscle spasm. This muscle spasm is often accompanied by significant pain, so it is also known as painful muscle spasm. It is mostly seen in menopausal women and often occurs at night, commonly known as calf cramps. Its attacks are directly related to endocrine disorders and calcium deficiency, and most patients will have osteoporosis at the same time, or combined with other symptoms of anxiety, depression and neurosis. There is no need to worry too much about this situation, slowly massage the stiff muscles, within 3-5 minutes the symptoms can be gradually relieved. If muscle stiffness occurs frequently, you can go to the hospital to prescribe calcium medication, it is recommended that Vitamin D Calcium Chewable Tablets are more appropriate, 2 tablets once a day, once a day, can be used for a long time. Calcium Vitamin D can help promote calcium absorption, which is more effective than simple calcium supplementation.