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2. Thyrotoxic myopathy - Wikipedia

   en.wikipedia.org/wiki/Thyrotoxic_myopathy

   Increased levels of cAMP within the muscle fibers cause increased release of Ca2+ from the muscle fiber's sarcoplasmic reticulum which eventually leads to more muscle contractions. Like the nervous system proposal increased muscle contractions eventually evoke muscle fiber fatigue, weakness, and finally degradation, which are characteristic ...

3. Thyrotoxic periodic paralysis - Wikipedia

   en.wikipedia.org/wiki/Thyrotoxic_periodic_paralysis

   The weakness is usually symmetrical; [5] the limb muscles closer to the trunk (proximal) are predominantly affected, and weakness tends to start in the legs and spread to the arms. Muscles of the mouth and throat, eyes, and breathing are usually not affected, but occasionally weakness of the respiratory muscles can cause life-threatening ...

4. Cramp - Wikipedia

   en.wikipedia.org/wiki/Cramp

   Causes of cramping include [9] hyperflexion, hypoxia, exposure to large changes in temperature, dehydration, or low blood salt. Muscle cramps can also be a symptom or complication of pregnancy; kidney disease; thyroid disease; hypokalemia, hypomagnesemia, or hypocalcaemia (as conditions); restless legs syndrome; varicose veins; [10] and ...

5. Muscle cramps are a pain. These expert-approved tips can help ...

   www.aol.com/muscle-cramps-pain-expert-approved...

   The pain from these contractions can cause mobility limitations and a tense feeling within the muscle, he says. While they’re usually harmless, muscle cramps are undoubtedly uncomfortable.

6. Myalgia - Wikipedia

   en.wikipedia.org/wiki/Myalgia

   Myalgia or muscle pain is a painful sensation evolving from muscle tissue. It is a symptom of many diseases . The most common cause of acute myalgia is the overuse of a muscle or group of muscles ; another likely cause is viral infection , especially when there has been no injury .

7. Here’s the Real Reason Why You Get Painful Toe Cramps - AOL

   www.aol.com/real-reason-why-painful-toe...

   Dr. Tarr adds that recurring cramps can sometimes be a sign of circulation issues, but there would usually be other signs along with the toe cramps, including cramps in your calves and upper legs.