https://www.mayoclinic.org/diseases-conditions/muscle-cramp/symptoms-causes/syc-20350820

Jan 3, 2019 ... If you've ever been awakened in the night or stopped in your tracks by a sudden charley horse, you know that muscle cramps can cause severe ...

https://www.webmd.com/pain-management/muscle-spasms-cramps-charley-horse

Mar 31, 2019 ... WebMD explains muscle spasms, cramps and charley horses, including symptoms, causes and treatments.

https://www.merckmanuals.com/home/brain,-spinal-cord,-and-nerve-disorders/symptoms-of-brain,-spinal-cord,-and-nerve-disorders/muscle-cramps

A cramp is a sudden, brief, unintended (involuntary), and usually painful contraction of a muscle or group of muscles. Muscle cramps can be a symptom of  ...

https://www.pharmacytimes.com/publications/issue/2017/july2017/leg-cramps-a-sign-of-underlying-illness

Aug 1, 2017 ... Leg cramps are characterized by sudden, severe, and involuntary muscle contractions.1 Leg cramps commonly affect the calf muscles but may ...

https://my.clevelandclinic.org/health/diseases/14170-leg-cramps-at-night

While both types of leg disturbances tend to happen at night, or at rest, restless leg syndrome does not cause pain or cramping. Restless legs syndrome is more  ...

https://my.clevelandclinic.org/health/diseases/15466-muscle-spasms

Muscle spasms range in intensity from mild twitches to severe pain. The spastic muscle may feel harder than normal to the touch, and/or appear visibly distorted.

https://www.nhsinform.scot/illnesses-and-conditions/muscle-bone-and-joints/conditions/leg-cramps

It usually occurs in the calf muscles, although it can affect any part of your leg, including your feet and thighs. After the cramping has passed, you may have pain  ...

https://www.medicinenet.com/muscle_spasms/article.htm

Chronic neck and back pain can lead to recurrent muscles spasms. Large muscle groups make up the trunk, including the neck, chest wall, upper back, lower ...

https://www.spine.org/KnowYourBack/Conditions/Other/Muscle-Spasms

Many patients complain of muscle pain, tightness, or spasms. ... and/ or rapid body fluid and electrolyte abnormalities responsible for chronic muscle cramps.

https://www.womenshealthmag.com/health/a19950167/muscle-spasm-health-issue/

Oct 19, 2017 ... Is it just a run-of-the-mill charley horse, or is your muscle spasm a sign ... "[But] occasionally the cramping is so severe that you may have sore ...