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.
Sweaty palms are normal. Except when they're not, but we'll get to that in a minute. Everyone has sweat glands in their palms, so it's natural to have some moisture there. We have two types of sweat glands, apocrine and eccrine. Apocrine glands secrete a thick sweat packed with fatty acids and proteins.