Summary
Differentials
Common
- Psoriasis
- Seborrheic dermatitis
- Atopic dermatitis
- Xerosis
- Perioral dermatitis
- Acne vulgaris
- Human papillomavirus (HPV) - warts or condylomata acuminata
- Herpes simplex virus (HSV)
- Varicella zoster virus (VZV)
- Folliculitis
- Syphilis (Treponema pallidum)
- Scabies
- Insect bite
- Candida
- Basal cell carcinoma (BCC)
- HIV-related lipodystrophy
- Nail lesions
- Gonorrhea
- Chlamydia/lymphogranuloma venereum
- Aphthous ulcers
Uncommon
- Photodermatitis
- Prurigo nodularis (PN)
- Papular pruritic eruption of HIV (PPE)
- Eosinophilic folliculitis
- Cutaneous manifestations of reactive arthritis (Reiter syndrome)
- Molluscum contagiosum virus
- Oral hairy leukoplakia (OHL) (Epstein-Barr virus)
- Human immunodeficiency virus (primary or acute infection)
- Bullous impetigo
- Ecthyma
- Botryomycosis
- Bacillary angiomatosis
- Leishmaniasis
- Dermatophytosis
- Kaposi sarcoma
- Melanoma
- Squamous cell carcinoma
- Morbilliform rash
- Drug rash with eosinophilia and systemic symptoms (DRESS)
- Toxic epidermal necrolysis (TEN)/Stevens-Johnson Syndrome (SJS)
- Immune reconstitution inflammatory syndrome (IRIS)
- Chancroid
- Merkel cell carcinoma
- Leiomyosarcoma
Contributors
Authors
Anja Potthoff, MD
Senior Doctor
Walk In Ruhr
Center for Sexual Health and Medicine
Department of Dermatology
University of Bochum
Borkum
Germany
Disclosures
AP is a co-author of a reference cited in this topic.
Norbert Brockmeyer, MD
Senior Doctor
Walk In Ruhr
Center for Sexual Health and Medicine
Department of Dermatology
University of Bochum
Bochum
Germany
Disclosures
NB is a co-author of some references cited in this topic.
Acknowledgements
Dr Anja Potthoff and Dr Norbert Brockmeyer would like to gratefully acknowledge Dr Patrick Unemori and Dr Kieron Leslie, the previous contributors to this topic.
Disclosures
PU and KL declare that they have no competing interests.
Peer reviewers
Viroj Wiwanitkit, MD
Professor of Tropical Medicine
Visiting Professor
Hainan Medical College
Haikou
China
Disclosures
VW declares that he has no competing interests.
Michael A. Waugh, MB, FRCP, FRCPI, FRChSHM, Dip. Ven, DHMSA
Retired Consultant Genitourinary Physician
Leeds General Infirmary
Honorary Sub Dean Northern and Yorkshire
Royal Society of Medicine
UK
Disclosures
MAW declares that he has no competing interests.
Jacqueline C. Dolev, MD, FAAD
Assistant Clinical Professor
Department of Dermatology
University of California San Francisco
San Francisco
CA
Disclosures
JCD declares that she has no competing interests.
Patient information
Acne
Cold sores
More Patient information
Log in or subscribe to access all of BMJ Best Practice
Use of this content is subject to our disclaimer