yes it is. my mom has it, my sister has it and i have it. I HATE IT SO MUCH!! i have it the worst and i think its getting even more worse. if i have a boy im not sure he'll get it (he probably will) cause my mom gave it to me and my sister. hope this helps.
Not all cases of hyperhidrosis is hereditary however, a good number of doctors believe that genetics plays a key role in determining an individual's perspiration pattern. Other secondary causes might be of psychological matter, for example patterns of behaviour, influenced by parent's reactions, witnessed by children within the first 6 years of their life. Like arachnophobia, which causes panic and anxiety when seeing spiders, hyperhidrois can occur, when children encouter special situations. Something they have indirectly learned from their parents.