Sometimes my hand's palm is sweating without any causes, can anyone tell why it can be happened?

Hyperhydrosis: Excess sweating can happen anyhwere. Sometimes it is palms sometimes armpits/forehead/etc. Usually it will be the same place each time. There are specific treatments and it has to do often with your nervous system wiring.

Hyperhidrosis: Primary hyperhidrosis (ph) is the medical term used to describe the condition of severe excessive sweating. Simply put, ph is a condition that involves overactive sweat glands. This usually occurs in the underarms, palms of the hands, and soles of the feet. Recently, Botox injections have been used as a safe, quick, and effective treatment for severe excessive sweating of these areas.