Hypothyroid myopathy

Nature 
Hypothyroid myopathy starts any time from childhood to adulthood. It is caused by insufficient hormone production by the thyroid gland causes hypothyroid myopathy. The disease produces weakness of arm and leg muscles, as well as stiffness and cramps. In children with this disease, muscle enlargement may occur. The disorder's severity depends upon the success in treating the underlying thyroid condition.
Type 
(G) Very specific problems