Presents as an itchy, red, weeping, and ill-defined eczematous rash confined to the area of contact with an allergen.
A yeast infection characterized by a beefy red, moist rash in the perianal area, often with distinct small satellite pustules at the border.
This inflammatory bowel disease uniquely manifests with perianal skin tags, deep fissures, fistulas (openings), or abscesses.
Genital warts appearing as single or multiple soft, fleshy, cauliflower-like growths in the perianal region.
A rare skin cancer presenting as a persistent, well-demarcated, red, scaly, and eczematous-looking plaque that is unresponsive to typical dermatitis treatments.
A rapidly progressing necrotizing fasciitis presenting with severe pain, swelling, erythema, and crepitus (a crackling sound) in the perineal region.
Presents as swollen, purplish vascular cushions or skin tags at the anal verge, which can be thrombosed (clotted) and extremely painful.
A rare disorder that can present as yellowish-brown, crusted, or ulcerative papules that mimic a severe seborrheic or diaper rash.
A chronic inflammatory condition causing characteristic whitish, atrophic, "cigarette paper" skin in the anogenital region, often with purpura.
A rare but aggressive cancer appearing as a pigmented (brown/black) or non-pigmented (amelanotic) nodule or plaque that may be ulcerated.
A bacterial infection, common in children, presenting as a sharply demarcated, bright red erythema around the anus, often with fissures and pain on defecation.
An opening or pit in the skin at the top of the buttocks crease, which can become an abscess filled with hair and debris.
Characterized by intense itching often without a primary visible lesion, though secondary changes from scratching like lichenification (thickened skin) are common.
Findings can include bruising, lacerations, fissures, or changes in anal tone, which are not typical of other dermatological conditions.
A malignant tumor presenting as a firm, indurated, warty, or ulcerative lesion in the perianal skin that fails to heal.
Primary syphilis presents as a painless, firm chancre (ulcer), while secondary syphilis can cause flat, wart-like lesions called condyloma lata.
A fungal infection (tinea cruris) that spreads to the perianal area, showing a scaly, erythematous plaque with a raised, active border.
