Myositis ossificans is a calcific mass formation in skeletal muscle 6 to 8 weeks after injury The most common effected site is within thigh muscles, but can also be seen in the arm muscles. Clinical features, includes continuous and extreme pain after injury, loss of movement, and a palpable solid mass within muscle. Stretching and massage should be avoided in the beginning, if they aggravate symptoms. Ossification can be seen on X-rays in as early as 6 weeks. Stretching and strengthening exercises may help to decree size of non tissue deposit. Consolidation of the effective destruction of resorption may take more than a year. Surgery may be considered when the end of the maturation process. If surgery is performed before maturation, it may cause more functional disability.