A randomized, controlled, split‐face study of botulinum toxin and broadband light for the treatment of erythematotelangiectatic rosacea

To study the efficacy and safety of botulinum toxin (BTX) combined with broadband light (BBL) in the treatment of rosacea‐related erythema and flushing. A randomized, single‐blind, split‐face controlled study including 22 patients with erythemato telangiectatic rosacea were enrolled. Both cheeks were randomly divided into experimental group and control group. They were treated three times with an interval of 1 month. In the first treatment, the experimental group received BBL treatment and intradermal injection of BTX, and the control group received BBL treatment and intradermal injection of the same amount of normal saline; in the second and third treatments were both groups received the same BBL treatment. The patients were evaluated before the first treatment and 1, 2, 3, and 6 months after the treatment. Compared with the control group, the hydration in the experimental group increased and the global flushing symptom score (GFSS), VISIA red value, erythema index, transepidermal water loss, and sebum secretion decreased. The differences were statistically significant (p