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The Chvostek sign (/ ˈ k v ɒ s t ɪ k /) is a clinical sign that someone may have a low blood calcium level (a decreased serum calcium, called hypocalcemia).The Chvostek sign is the abnormal twitching of muscles that are activated (innervated) by the facial nerve (also known as Cranial Nerve Seven, or CNVII). [1]
The neuromuscular symptoms of hypocalcemia are caused by a positive bathmotropic effect (i.e. increased responsiveness) due to the decreased interaction of calcium with sodium channels. Since calcium blocks sodium channels and inhibits depolarization of nerve and muscle fibers, reduced calcium lowers the threshold for depolarization. [ 7 ]
Hormones and certain medications can also make pigmented bands in the nails, but be especially watchful for nail cancer symptoms, such as a brown or dark stripe that goes from the cuticle out to ...
Some people suggest that it also may be caused by calcium deficiency, [13] although this is not backed up by research. Leukonychia occurs most commonly in healthy individuals, and is unrelated to any known nutritional or physiological deficiency. [5] When caused by injury the marks will disappear as the nail grows outwards.
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Low vitamin D in the body can lead to a lack of calcium absorption and secondary hyperparathyroidism (hypocalcemia and raised parathyroid hormone). [1] Symptoms of hypocalcemia include numbness in fingers and toes, muscle cramps, irritability, impaired mental capacity and muscle twitching.
Apply nail strengtheners or hardeners that contain ingredients like keratin, calcium, or vitamins to help the nails, says Dr. Kamangar. 4. Maintain a balanced diet.
Although overall well-being is not typically determined by nail health, fissures, nail fissures (or breaks) and calcium spots are minor indications of inner health. [2] Hapalonychia is known to occur in persons with myxedema , rheumatoid arthritis , anorexia , bulimia , Hansen's disease , Raynaud phenomenon , oral retinoid therapy , and ...