Some symptoms may require urgent medical evaluation. Know when to seek emergency care.
Muscle weakness is a lack of muscle strength. It can affect one muscle group or the entire body and may be temporary or persistent.
This content is for informational purposes only and does not substitute professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical concerns. In case of emergency, call 911 or your local emergency services immediately.
Muscle weakness may feel like: • Difficulty lifting objects • Trouble climbing stairs • Fatigue with normal activities • Shaking or trembling muscles • True weakness vs. perceived weakness
Actual reduction in muscle power.
Feels weak but can generate normal force.
Affects specific muscle group.
Affects entire body.
Fatigue from excessive exercise or activity.
Low potassium, calcium, or magnesium.
Pinched nerve affecting muscle function.
Autoimmune condition causing weakness.
Sudden weakness on one side of body.
Muscle weakness can be caused by lack of use, aging, electrolyte imbalance, nerve compression, autoimmune diseases like myasthenia gravis, stroke, medication side effects, or nutritional deficiencies.
Seek immediate emergency care for sudden weakness on one side of the body, especially with facial drooping, slurred speech, or vision changes - these may indicate stroke. Also see a doctor for rapidly progressing weakness or weakness with other symptoms.
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Our content is created by a team of licensed physicians, nurses, and medical writers to ensure accuracy, clarity, and practical utility.
All health information is based on peer-reviewed research, clinical guidelines, and recommendations from authoritative health organizations like CDC, WHO, and Mayo Clinic.
January 2025
We regularly review and update our content to reflect the latest medical research and clinical practices.
The information provided on this website is for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical concerns. In case of emergency, call emergency services immediately.
Internal Medicine Physician
Internal Medicine
Dr. Rodriguez is a board-certified internist with expertise in primary care and preventive medicine.
Remember: In case of a medical emergency, call 911 immediately.
This page is for informational purposes only and does not replace professional medical advice.
