Hailey-Hailey Disease (HHD) is a rare, chronic skin condition characterized by relapsing episodes and spontaneous remissions, significantly affecting patients’ quality of life, especially in severe cases. Due to its rarity, there are no established evidence-based treatment guidelines or extensive clinical trials. This case report highlights the rapid improvement of HHD in a 55-year-old Filipino woman treated with a combination of 5-fluorouracil and excimer phototherapy, suggesting that this treatment approach may be an effective alternative for managing the disease.