The terms "non-comedogenic" and "non-acne(i)genic" appeared on moisturizers and other cosmetic compounds as re-formulations were introduced, sometimes associated with claims that the products were oil-free or water-based. Although early work produced lists of comedogenic chemicals in various strengths and vehicles, it became apparent that the actual comedogenicity of a product could not be predicted from its contents; rather the finished product itself needed to be use-tested.

The production of a low-grade folliculitis by some components of cosmetic products has led to misdiagnosis on occasion.

People may not attribute their reactions to their cosmetics at first, but may notice worsening symptoms after using certain face makeup, sunblock or lip products.

thickness: Onychogryphosis · Onychauxis

color: Beau's lines · Yellow nail syndrome · Leukonychia · Azure Lunula

shape: Koilonychia · Nail clubbing

behavior: Onychotillomania · Onychophagia

other: Ingrown nail · Anonychia

noncicatricial alopecia: Alopecia/Alopecia areata (Alopecia totalis, Alopecia universalis, Ophiasis)Androgenic alopecia · Hypotrichosis · Telogen effluvium · Traction alopecia · Lichen planopilaris · Trichorrhexis nodosa · Alopecia neoplastica · Anagen effluvium · Androgenetic alopecia · Alopecia mucinosa · Male-pattern baldness

cicatricial alopecia: Pseudopelade of Brocq · Central centrifugal cicatricial alopecia · Pressure alopecia · Traumatic alopecia · Tumor alopecia · Hot comb alopecia · Perifolliculitis capitis abscedens et suffodiens · Graham-Little syndrome · Folliculitis decalvans