Heterogeneous Missense SCN9A Mutation in Primary Erythromelalgia

The primary cause of primary erythromelalgia, an autosomal dominant genetic disorder characterized by hyperexcitability of sodium-gated voltage channels, is known to be a gain-of-function mutation in the SCN9A, SCN10A, and SCN11A genes. We describe the case of a 6-year-old kid who experienced the classic triad of erythema, redness, and burning pain in both upper and lower limbs. While gabapentin and oxcarbazepine may help with symptoms, there are not many recommendations for long-term treatment in the literature. To effectively treat such patients, a multidisciplinary team comprising pediatricians, pain specialists, and geneticists is required in addition to medical care. Pharmacogenomics may have advantages, as revealed by genome sequencing, but more study is required. The best course of action for patients is to avoid triggers such as intense physical activity and exposure to hot, muggy conditions.