Clascoterone is a topical antiandrogen which has demonstrated effectiveness in the treatment of acne in both males and females and is currently in the late stages of clinical development.[119][120][121][122] It has shown no systemic absorption or associated antiandrogenic side effects.[121][122][123] In a direct head-to-head comparison, clascoterone showed greater effectiveness than topical isotretinoin.[121][122][123] 5α-Reductase inhibitors such as finasteride and dutasteride may be useful for the treatment of acne in both males and females, but have not been thoroughly evaluated for this purpose.[1][124][125][126] In addition, the high risk of birth defects with 5α-reductase inhibitors limits their use in women.[1][125] However, 5α-reductase inhibitors can be combined with birth control pills to prevent pregnancy, and are frequently used to treat excessive hair in women.[124] There is no evidence as of 2010 to support the use of cimetidine or ketoconazole in the treatment of acne.[127]
ungrouped: Paronychia Acute Chronic Chevron nail Congenital onychodysplasia of the index fingers Green nails Half and half nails Hangnail Hapalonychia Hook nail Ingrown nail Lichen planus of the nails Longitudinal erythronychia Malalignment of the nail plate Median nail dystrophy Mees' lines Melanonychia Muehrcke's lines Nail–patella syndrome Onychoatrophy Onycholysis Onychomadesis Onychomatricoma Onychomycosis Onychophosis Onychoptosis defluvium Onychorrhexis Onychoschizia Platonychia Pincer nails Plummer's nail Psoriatic nails Pterygium inversum unguis Pterygium unguis Purpura of the nail bed Racquet nail Red lunulae Shell nail syndrome Splinter hemorrhage Spotted lunulae Staining of the nail plate Stippled nails Subungual hematoma Terry's nails Twenty-nail dystrophy

Diet. Studies indicate that certain dietary factors, including skim milk and carbohydrate-rich foods — such as bread, bagels and chips — may worsen acne. Chocolate has long been suspected of making acne worse. A small study of 14 men with acne showed that eating chocolate was related to a worsening of symptoms. Further study is needed to examine why this happens and whether people with acne would benefit from following specific dietary restrictions.
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