Pigmented rashes

Background

Normal dermal anatomy.

Differential Diagnosis

Hyperpigmentation

• Postinflammatory hyperpigmentation (acne, Psoriasis, atopic and contact dermatitis, lichen planus, trauma, drugs, and fixed-drug eruptions)
• Melasma
• Solar lentigines
• Ephelides (freckles)
• Café-au-lait macules
• Nevi
• Melanoma and precursors

Hypopigmentation

• Vitiligo
• Pityriasis alba
• Tinea versicolor
• Postinflammatory hypopigmentation
• Piebaldism
• Tuberous sclerosis
• Hypomelanosis of Ito

See Also

• Rashes