It may also affect muscles and bone, but it does not affect internal organs. This form is usually not as severe as generalized scleroderma. People who develop localized scleroderma usually do not develop generalized scleroderma. The patches are usually whitish with a purplish ring around them. They usually occur on the trunk, but can also occur on the face, arms, legs, and other parts of the body.
Morphea often improves by itself, over time.
It can occur in more than one area. The line can extend deep into the skin and affect the bones and muscles underneath it. This can affect the motion of joints and muscles, as well as the growth of the affected area. Linear scleroderma usually occurs in childhood. The severity of this form depends on the organs affected and how much they are affected.