Found some info on it... u can read it.
Sweaty palms is a condition referred to as palmar hyperhidrosis. This medical condition is caused by hyperactive sympathetic nervous activity over sweat glands of the hands. Medical treatment typically consists of prescription medication, which only reduces sweating temporarily, and is not normally effective in severe cases of this condition. The only effective treatment for patients with server palmar hyperhidrosis is a surgical procedure called thoracoscopic sympathectomy. This procedure can now be performed safely as an outpatient, same day basis
http://www.curesweatypalms.com/hyperhidrosis_oc_article030518.shtmlhttp://www.harthosp.org/articles/docs/news010624a.htmlHow to Prevent Sweaty Palms
Until the practice of shaking hands goes out of vogue, sweaty palm sufferers will want to figure out a way to solve, or at least minimize, this problem.
Steps:
1. Try clapping cornstarch or talcum powder between your palms. Medicated powders are available to soak up moisture, too.
2. Use an unscented, aluminum salt-based antiperspirant, preferably a product made for palms and feet.
3. Wipe your palms often on tissues or a hand towel.
4. Apply aluminum chloride paint to the area for persistent clamminess.
5. Make an appointment to see your health care provider if over-the-counter remedies don't help. Profuse sweating that occurs at inappropriate times (when you're not hot and you haven't been exercising) is a rare condition called hyperhidrosis.
6. Get several opinions; some things help some folks and not others.
Tips:
With the help of your medical provider, discuss prescription drugs, toxin injections and even mildly invasive surgical procedures that are available.
Learn about iontophoresis, a technique that involves applying low electrical currents to affected areas.
Sweaty palms in a tense or high-anxiety moment is perfectly normal and will ease up once the moment has passed.
Warnings:
If symptoms persist or if you have specific medical conditions or concerns, we recommend you contact a physician. This information is not intended as a substitute for professional medical advice or treatment.
http://www.ehow.com/how_5024_prevent-sweaty-palms.html