Shaking in your thumb is called a tremor or twitch. Essential tremor is an inherited condition that makes the hands shake. If one of your parents has the gene mutation that causes essential tremor, you have a strong chance of developing this condition later in life.
Essential tremor ET is a neurological disorder that causes your hands, head, trunk, voice or legs to shake rhythmically. It is often confused with Parkinson's disease. Essential tremor is the most common trembling disorder.
A tremor is an involuntary,  somewhat rhythmic, muscle contraction and relaxation involving oscillations or twitching movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal foldstrunk, and legs. Most tremors occur in the hands.
Muscle twitching is caused by minor muscle contractions in the area, or uncontrollable twitching of a muscle group that is served by a single motor nerve fiber. Muscle twitches are minor and often go unnoticed. Some are common and normal.
Do you ever notice that you can't seem to hold a coffee cup still? Or that your hands sometimes tremble so much it interferes with daily chores? Those involuntary hand movements are called tremors.
A tremor is an involuntary quivering movement or shake. However, tremor is annoying. It also attracts attention, so that people tend to keep their bad hand in a pocket, or to sit on it during conferences.
Thumb twitching, also called a tremorhappens when thumb muscles contract involuntarily, causing your thumb to twitch. Twitching can result from activity in nerves connected to your thumb muscles, stimulating them and causing the twitching. If thumb twitching disrupts your everyday activities, you can see a doctor to diagnose the cause. Some causes of thumb twitching result from your lifestyle, such as your exercise routine or diet.