Tremor
Tremor is the repetitive, involuntary shaking of a body part, most commonly the hands or head. It can be due to genetic causes or a sign of another health problem.
Most Common Causes of Rest Tremor
Parkinson’s disease - The most common cause of rest tremor is Parkinson disease.
Dystonic tremors – it is associated with a neurologic disorder causing twisting movements and abnormal posture
Rubral tremor, caused by conditions that damage part of the brainstem
Wilson disease, a rare inherited disease that causes copper to build up in the body
Thyroid disease – due to increased secretion of thyroid hormones.
Less common causes:
Certain medications, such as those used to treat asthma or other breathing problems, steroids (glucocorticoids), and some drugs used to treat neurologic or psychiatric disorders
Stimulants, such as caffeine and nicotine
Anxiety, excitement, fear, and other extreme emotions
Muscle fatigue, which can happen after a challenging workout
Alcohol or drug withdrawal
Overactive thyroid (hyperthyroidism)
Fever
Familial / Genetic Causes:
Essential tremors – one of the commonest causes of familial tremors. sometimes as early as childhood, in the young adult or later years.
Cerebellar tremors - caused by damage to a part of the brain called the cerebellum or the pathways that connect to it; patients with Spinocerebellar ataxias. It can also caused by multiple sclerosis, brainstem trauma, and stroke may experience this tremor.