Calculate the gross margin percentage, mark up percentage and gross profit of a sale from the cost and revenue, or selling price, of an item.
While frequent cramping of the hand is often linked to arthritis, hand cramps can be a symptom of various other chronic diseases. Diabetes, for example, is commonly linked to hand cramps because the condition often leads to poor circulation in the limbsâa leading cause of muscle cramping.
Some of the possible common medical causes of Involuntary twitches in the hands may include: 1  Excessive caffeine intake or other caffeinated drink. 2  Excessive alcohol consumption, alcoholism, or alcohol withdrawal. 3  Stress. 4  Anxiety. 5  Fatigue. 6  Benign essential tremor. 7  Thyrotoxicosis. 8  Carbon dioxide narcosis.