Oct 11, 2022 · Muscle spasms Swelling Muscle weakness When to see the doctor Mild strains can be treated at home. See a doctor if your symptoms worsen despite treatment — especially if your pain …

Apr 1, 2026 · Check with your doctor right away if you have dark urine, fever, muscle cramps or spasms, muscular pain, stiffness, tenderness, wasting or weakness, or unusual tiredness or weakness.

Apr 1, 2026 · Tizanidine acts on the central nervous system (CNS) to produce its muscle relaxant effects. Its actions on the CNS may also cause some of the medicine's side effects.

Jan 17, 2026 · Overview Myalgic encephalomyelitis/chronic fatigue syndrome, also called ME/CFS, is a complicated condition. It causes extreme fatigue that lasts for at least six months. Symptoms worsen …

A heart attack occurs when an artery that sends blood and oxygen to the heart is blocked. Fatty, cholesterol-containing deposits build up over time, forming plaques in the heart's arteries. If a plaque …

Sep 12, 2024 · Serotonin syndrome is a serious drug reaction. It is caused by medications that build up high levels of serotonin in the body. Serotonin is a chemical that the body produces naturally. It's …

Jul 21, 2025 · Very rarely, statins can cause life-threatening muscle damage called rhabdomyolysis (rab-doe-my-OL-ih-sis). Rhabdomyolysis can cause extreme muscle pain, liver damage, kidney failure, …

Jan 21, 2026 · Weight training technique that isn't proper can lead to muscle strains and other painful injuries that may hamper your weight training efforts. If you're just getting started, work with a …

Mar 17, 2026 · Overview Amyotrophic lateral sclerosis (a-my-o-TROE-fik LAT-ur-ul skluh-ROE-sis) is a nervous system disease that affects nerve cells in the brain and spinal cord. Also known as ALS, the …

Motor nerves that control muscle movement. Autonomic nerves that control functions such as blood pressure, sweating, heart rate, digestion and bladder function. Symptoms of peripheral neuropathy …