hyperhidrosisnoun [ U ]
uk/ˌhaɪ.pə.hɪˈdrəʊ.sɪs/us/ˌhaɪ.pɚ.hɪˈdroʊ.sɪs/specializeda condition in which a person produces much more sweat (= a salty liquid passed through the skin) than normal:
The first step in treating hyperhidrosis is to determine whether there is an underlying condition causing the excessive sweating.