Hand muscle cramps that can spread up the arm are often due to muscle strain, dehydration, nerve compression (such as carpal tunnel syndrome), or an electrolyte imbalance. You should consult a doctor to find out the underlying cause and get proper treatment. Until then, maintain good posture, try gentle stretching, and get enough magnesium and potassium through your diet or supplements to help relax your muscles.

A high parathyroid hormone level is usually treated based on the underlying cause, such as overactive parathyroid glands, low calcium, vitamin D deficiency, or kidney disease. Please consult your doctor or an endocrinologist for appropriate treatment, which may include medications to reduce PTH levels (such as Cinacalcet), calcium and vitamin D supplements, or sometimes surgery if the glands are overactive. Do not start any medication without proper medical advice.