Correlation between benign joint hypermobility syndrome and primary focal hyperhidrosis in children: a novel concept.

Background: Benign joint hypermobility syndrome (BJHS) is one of the most common hereditary connective tissue disorders in children in which autonomic nervous system involvement has been reported. This study aimed to evaluate the frequency of primary focal hyperhidrosis in children with BJHS.

Methods: This observational-analytical study was conducted in a case-control setting on children aged 3 to 15 years in 2018 at Mofid Children's Hospital, Tehran, Iran.