Y56: Topical agents primarily affecting skin and mucous membrane and ophthalmological, otorhinolaryngological and dental drugs

Y56.8: Other topical agents

ICD-10 code Y56.8 refers to a negative response to certain topical agents. These are substances that are applied directly onto the skin or other body surfaces for treatment or cosmetic purposes. Typically these agents may be creams, ointments, lotions, patches, or gels that contain active ingredients for treating a variety of conditions or for enhancing skin quality. A person with this condition might experience side effects or adverse reactions from the application, such as redness, itchiness, blistering, or other irritations directly on the area where the agent was applied. In some cases, systemic reactions can occur, leading to symptoms beyond the application site. These reactions often occur due to an allergy or sensitivity to one or more ingredients in the product. The kind of topical agent causing the reaction could be anything outside of those categorically defined elsewhere, hence it is defined as "other topical agents".