Toxic epidermal necrolysis (TEN), a delayed-type hypersensitivity reaction, is the most severe form of severe cutaneous adverse reactions. 1 Patients with TEN often have skin infections covering large areas of exposed skin. Although causative drug withdrawal and supportive care can halt disease progression, how to promote the early recovery of skin lesions is still a challenge in clinical care. Gromwell (Lithospermum erythrorhizon), known as zicao in China, is used for the F I G U R E 1 A, Rash, myalgia, extensive fissures and hardened membrane in admission; B, exposure therapy and using gromwell oil soak sterile gauze covered the whole body; C, 40 days after treatment; D, discharge day