Additional Study Information: Juvenile fibromyalgia (JFM) is a cause of chronic, whole-body pain. The cause of JFM is unknown. One of the possible causes of JFM is a problem with nerves called "small fiber neuropathy." This is a problem where small nerve fibers in the skin are not working properly and patients can have pain as a result. Recent studies have found evidence of small fiber neuropathy in adults with fibromyalgia. It is unknown if the same is true in pediatric patients who have JFM. The primary way to diagnose small fiber neuropathy is by performing a skin biopsy to look at the small nerve fibers in the skin. Subjects in this study will be asked to answer questions about their symptoms on an online survey. If they meet criteria for diagnosis of JFM, they will be eligible for a second part of the study, which will involve coming for a skin biopsy. The aim of this study is to investigate small fiber neuropathy as a possible cause for JFM.