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.
Credit: BSIP/UIG Universal Images Group Getty Images. Some of the conditions that WebMD names, such as toxic shock syndrome and cat-scratch disease, have a clear connection to body shaking. However, some of the other conditions, such as lupus, endocarditis and porphyria, may come as more of a surprise. The site also mentions lyme disease, hypothyroidism in adults, bird flu, west Nile virus, ricin poisoning and tick bites as potential causes of body shaking.