Alternate Names : Lack of strength, Muscle weakness
Weakness is a reduction in the strength of one or more muscles.
Overview & Considerations
Weakness may be generalized (total body weakness) or localized to only one area, side of the body, limb, or muscle. Weakness is more notable when it is localized. Localized weakness may follow a stroke, flare up of multiple sclerosis, or injury to a nerve.
Weakness may be subjective or objective.
- Subjective means you feel weak, but there is no measurable loss of strength. For example, you may feel weak if you have infectious diseases such as mononucleosis and the flu.
- Objective means there is a measurable loss of strength noted during a physical exam.
Measurable weakness may result from a variety of conditions including metabolic, neurologic, primary muscular diseases, and toxic disorders.
PRIMARY MUSCULAR DISEASES