Tending to inflame, kindle, or irritate.

Tending to excite anger, animosity, tumult, or sedition; seditious; as, inflammatory libels, writings, speeches, or publications.

Accompanied with, or tending to cause, preternatural heat and excitement of arterial action; as, an inflammatory disease.

"Causing inflammation." Many acne lesions may become inflamed because of bacteria trapped in the follicles. Comedones are associated with redness and irritation of the skin.