Urushiol, is the rash-causing oil found in all parts of poison ivy, poison oak, and poison sumac plants. Approximately 85% of the population experiences an allergic reaction to these noxious plants, and according to the National Institute of Occupational Health & Safety, 50 micrograms of urushiol is enough to cause a rash in 80-90% of adults.
Sweaty palms, more properly known as palmar hyperhidrosis, is a condition that affects about 1% of the US population. Although the exact cause of sweaty palms is still debated, many experts believe it is caused by a hyperactive sympathetic nervous system, causing the sweat glands in the hands to produce sweat unnecessarily.
Excessive sweating, or hyperhidrosis, refers to a problem wherein people sweat much more than usual for no real reason. Of course, there are several basic factors that might make you sweat more, in general, though, such as the following: 1  Heredity â some peopleâs soles and palms have the tendency to sweat a lot. 2  Certain drinks and foods. 3  Drinking hot drinks, caffeinated drinks and alcoholic drinks. 4  Eating spicy foods.