Sun exposure left a woman in "insufferable pain"

Updated on: October 3, 2026 / 10:10 AM EDT / CBS News

Sun exposure left a woman in "insufferable pain"

TL;DR

  • Emily Pearson suffered from erythropoietic protoporphyria (EPP), a rare disorder causing extreme pain from sun exposure.
  • For years, her life was limited by the need to constantly protect herself from sunlight.
  • She participated in a clinical trial for bitopertin, a drug that lowers protoporphyrin IX levels in the skin.
  • The medication has dramatically increased her sun tolerance, enabling her to run a marathon and enjoy outdoor activities without severe pain.
  • Bitopertin is currently in Phase 3 clinical trials, with Disc Medicine awaiting further data for FDA review.