Poison ivy, oak, and sumac facts. 1  Poison ivy, poison oak, and poison sumac are plants than can cause an itchy rash upon contact. 2  A substance called urushiol, found in these plants, causes the rash. 3  The rash is not contagious.  The rash usually disappears in one to three weeks.
Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Tremor) that could possibly cause Tremor includes: 1  Parkinson's disease. 2  Drug-induced tremor. 3  Parkinson disease 8 - tremors.  Parkinson disease 13 1  - tremors. Neuhauser-Daly-Magnelli syndrome - tremors.  Multiple endocrine neoplasia - Tremors.
What causes tremor? Generally, tremor is caused by a problem in the deep parts of the brain that control movements. Most types of tremor have no known cause, although there are some forms that appear to be inherited and run in families. Tremor can occur on its own or be a symptom associated with a number of neurological disorders, including: 1  multiple sclerosis. 2  stroke. 3  traumatic brain injury. 4  neurodegenerative diseases that affect parts of the brain (e.g., Parkinson's disease).