An open sore, abrasion, or scalp irritation generally means a chemical texture service should be:

If the client has an open sore, abrasion, or scalp irritation, a chemical texture service should be postponed or not performed, because the strong chemicals can severely irritate, burn, or injure broken or inflamed skin and may indicate the scalp is not in a fit condition. The cosmetologist should reschedule once the scalp has healed, and refer to a physician if needed. Checking the scalp for broken skin and contraindications before applying chemicals is an essential safety step that the exam expects candidates to know.