When you find it hard to move a muscle, and it feels tight, usually at rest, it is called muscle stiffness. The common causes of muscle stiffness include muscle sprain, muscle strain, insect bite, infection, anesthesia, and extreme heat or cold injury. If your neck feels stiff and you have a fever, consult a doctor immediately as it can be signs of infection of the brain or spinal cord.
Stiff Skin Syndrome - Causes, Symptoms, and Treatment
Stiff skin syndrome is a rare cutaneous condition that causes stony, hard, and thick skin all over the body.
Myotonia Congenita - An Overview
Myotonia congenita is a weakness in the supporting muscles (skeletal muscles) present from birth. Read below to know more.