People with cancer may need surgery, chemotherapy , or radiation therapy . People with a muscle injury may need to apply ice to the muscle, take pain medication and rest. Side effects depend on the treatments used. All medications have possible side effects. For example, antibiotics may cause allergic reactions and stomach upset.
Corticosteroids can cause weight gain, a puffy-looking face, and weak bones.
Surgery carries a risk of bleeding and infection. In other cases, treatment may not end. For example, those with severe heart, liver, or kidney disease usually need treatment for life. People can monitor their weakness and how it responds to treatment at home. Further monitoring depends on the cause.