Tremor is uncontrollable rhythmic movement of a limb produced by muscle contractions. Tremor is common in a condition called Essential Tremor and in Parkinson's disease. Tremor may significantly interfere with a person's ability to lead a normal lifestyle.

Essential tremor (ET) is a movement disorder characterized by uncontrollable shaking (tremors) in different parts and on different sides of the body. Areas affected often include the hands, arms, head, larynx (voice box), tongue, chin, and other areas. In rare cases, the lower body is affected. See similar questions...

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There is no cure for tremor or its underlying causes. However, effective treatment can help control symptoms. For people with Essential Tremor, propranolol and primidone are the most frequently used medications. Tremor in Parkinson's disease is generally treated with levodopa and other drugs. See similar questions...

There is no cure for ET, but treatments that provide relief from its symptoms may be helpful in improving quality of life. These include medications and surgical procedures that ease tremor. Not every treatment or procedure is effective for every person with ET. Your doctor will recommend an individualized treatment plan, including certain lifestyle changes that may help to reduce your tremors. See similar questions...

There is currently no evidence that alternative therapies are beneficial in treating ET. Patients who have tremors that worsen with emotional stress may find relaxation therapies helpful, but this type of alternative therapy is certainly not a treatment. Some herbal supplements may actually increase tremor. Always consult your doctor before trying any alternative therapy. See similar questions...

Activa Tremor Control Therapy is an adapatable and reversible non-destructive therapy that uses small electrical pulses to stimulate the brain and block the brain signals that cause tremor. The therapy involves the implantation of an insulated wire lead in the thalamus area of the brain. The lead is connected by an extension to an Implantable Pulse Generator (like a cardiac pacemaker) implanted beneath the skin in the chest area. See similar questions...

Almost all teenagers get acne at one time or another. You haven't done anything to cause your acne. It's not your fault if you have it. Pimples are caused when oil ducts in the skin get plugged up and then burst, causing redness and swelling. Although there are many myths about acne, the following are the three main factors that cause it. When you begin puberty, certain hormones, called androgens, increase in both males and females. See similar questions...

Several factors contribute to the development of acne. The primary problem is that the abnormal flaking of cells inside the hair follicle leads to the formation of a plug. The plug can enlarge and even rupture the hair follicle. A ruptured hair follicle spills its contents of oil and debris into the skin where it leads to swelling and causes redness (inflammation). See similar questions...

Parts may distort as they solidify and cool in the die, or during ejection from the die. These problems are solvable but usually require discussions between the part designer, the tool designer and the die-casting engineer since they involve increasing draft angles etc. However, part distortion is quite often caused by mishandling during press trimming, polishing etc. or when the parts are clamped in jigs for machining, plating or painting. See similar questions...

Patients with long QT syndrome develop a very fast heart rhythm disturbance known as "Torsade de pointes". This is a form of ventricular tachycardia. This rhythm is too fast for the heart to beat effectively, so the blood flow to the brain falls precipitously causing the sudden loss of consciousness. In most instances, there is no warning prior to syncope. See similar questions...

Melanoma is a malignancy of melanocytes, special cells in the skin which synthesize skin pigment. It is the most rapidly increasing form of cancer in the US. Although all causes of melanoma are not known with certainty, epidemiologic studies suggest that brief, intense exposure to ultraviolet radiation contributes to the development of melanoma. See similar questions...

allergic reaction occurs when your immune system reacts to a foreign substance from the outside world. These foreign substances, normally small proteins, can come from dust mite feces, pollens, molds, and many other natural and man-made objects. See similar questions...

Shorter days of winter and lack of light are considered one cause of seasonal depression, especially for people who move to extreme northern climates, where winter days are very short or seasonal differences in the amount of daylight are extreme.1, 2 However, researchers are studying other possible causes, including disturbances in the body's natural biological clock (circadian rhythms) or problems with the regulation of a brain chemical (neurotransmitter) called serotonin. See similar questions...