A tremor is an involuntary, rhythmic shaking or trembling of a part of the body, often affecting the hands, arms, or legs. It can occur at rest or during movement and is commonly associated with conditions like Parkinson's disease or essential tremor. Tremors can vary in intensity and frequency, impacting daily activities. Tremors can be caused by various factors, including neurological disorders, anxiety, fatigue, or certain medications. They may also occur temporarily due to stress or excessive caffeine consumption. Understanding the underlying cause is essential for effective management and treatment of tremors.