Will polymyositis recover? The recovery of polymyositis muscles depends on the length of treatment and the severity of muscle atrophy. If the patient has only mild muscle atrophy and limb weakness in the early stage of polymyositis, then hormones or immunosuppressants can be given, and muscle massage can be performed to promote muscle recovery. If a patient with polymyositis is in an advanced stage of generalized muscle atrophy, then muscle weakness with myocardial damage and cardiac arrhythmias is less likely to recover after treatment.