The doctor will diagnose ET by seeing a person have tremors. The doctor will sometimes use an electromyography test, called EMG, to confirm the diagnosis. This kind of test checks the electrical activity in a set of muscles. An overactive thyroid gland, called hyperthyroidism, can mimic essential tremor. Blood tests can help rule out this condition.
A person who comes to a doctor with ET is often concerned about Parkinson disease. A doctor can usually tell these two types of tremors apart.