Muscle strains - Symptoms and causes - Mayo Clinic
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 …
Performance-enhancing drugs: Know the risks - Mayo Clinic
Jun 27, 2023 · Helps build muscle. Causes features such as facial hair and a deeper voice. The anabolic steroids used by athletes are often forms of testosterone made in a lab. Some people use anabolic …
Statin side effects: Weigh the benefits and risks - Mayo Clinic
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, …
Strength training: Get stronger, leaner, healthier - Mayo Clinic
Apr 29, 2023 · Lean muscle mass naturally diminishes with age. Your body fat percentage will increase over time if you don't do anything to replace the lean muscle you lose over time. Strength training …
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)
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 …
Weight training: Do's and don'ts of proper technique
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 …
Amyotrophic lateral sclerosis (ALS) - Symptoms and causes
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 …
Serotonin syndrome - Symptoms & causes - Mayo Clinic
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 …
Peripheral neuropathy - Symptoms and causes - Mayo Clinic
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 …
Ivermectin (oral route) - Side effects & dosage - Mayo Clinic
Feb 1, 2026 · Description Ivermectin is used to treat river blindness (onchocerciasis), intestinal infection from threadworms (strongyloidiasis), and other kinds of worm infections. Ivermectin is an …