Medical conditions that cause shaking or tremors in the hand include brain tumor, multiple sclerosis, Parkinson's disease or an overactive thyroid, according to MedlinePlus. Other causes of tremors in the hand include alcoholism, muscle weakness, aging, stress and stroke. Medications, caffeine or brain disorders may also contribute to tremors.
Depending on the cause of a tremor, it is possible to treat them at home, explains MedlinePlus. For instance, if stress is causing tremors, an individual may try relaxation techniques such as yoga or meditation. Avoiding caffeine and getting enough sleep can also keep tremors at bay. If medication is causing the shaking, an individual must talk to the doctor about other options, but it is important not to stop taking the medication without first consulting with a medical professional.
If home treatment does not work for tremors, a person must see his doctor for an examination, claims MedlinePlus. Some of the tests that may occur during the examination include blood tests, nerve conduction studies, a head CT scan, urine test or an MRI. Once the doctor finds the cause of the tremors, he decides on a course of treatment for that condition. In most cases, once the doctor treats the cause of the shaking hands, the tremors cease.