How does a health care provider tell the difference between scalp psoriasis and seborrheic dermatitis of the scalp?
Answer From Olayemi Sokumbi, M.D.
Your health care provider will likely be able to tell you if you have scalp psoriasis, seborrheic dermatitis or both by looking at your skin, scalp and nails.
Scalp psoriasis and seborrheic dermatitis are common conditions that affect the scalp. And they share some symptoms, such as inflamed, scaly skin.
Most often, the scales of psoriasis look thicker and drier than the scales of seborrheic dermatitis. Psoriasis tends to extend beyond the hairline. And psoriasis usually affects more than one area of the body. If you have scalp psoriasis, you may have mild psoriasis on your elbows, knees or lower back too. Or you may notice nail changes, such as pitting.
- Inflamed skin covered with scales or with oily, crusted patches called plaques
- Patches that may extend beyond the hairline or appear on other parts of the body
Seborrheic dermatitis of the scalp
- Inflamed skin covered with scales or crusted patches
- Skin flakes, called dandruff, on the scalp and hair
Scalp psoriasis and seborrheic dermatitis of the scalp share some similar treatments, including medicated shampoos and corticosteroid lotions. Scalp psoriasis is often persistent and more difficult to treat than is seborrheic dermatitis of the scalp. Other treatments, such as light therapy, may be needed to help control psoriasis.
Olayemi Sokumbi, M.D.
Sept. 24, 2022
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See more Expert Answers
- AskMayoExpert. Psoriasis. Mayo Clinic; 2021.
- Kelly AP, et al. Psoriasis. In: Taylor and Kelly's Dermatology for Skin of Color. 2nd ed. McGraw Hill; 2016. https://accessmedicine.mhmedical.com. Accessed Sept. 13, 2021.
- Bolognia JL, et al., eds. Psoriasis. In: Dermatology. 4th ed. Elsevier; 2018. https://www.clinicalkey.com. Accessed March 5, 2020.
- Dinulos JGH. Psoriasis and other papulosquamous diseases. In: Habif's Clinical Dermatology. 7th ed. Elsevier; 2021. https://www.clinicalkey.com. Accessed March 5, 2020.
- AskMayoExpert. Seborrheic dermatitis. Mayo Clinic; 2022.
- Kelly AP, et al., eds. Seborrheic dermatitis. In: Taylor and Kelly's Dermatology for Skin of Color. 2nd ed. McGraw Hill; 2016. https://accessmedicine.mhmedical.com. Accessed March 16, 2022.
- Sokumbi O (expert opinion). Mayo Clinic. Aug. 31, 2022.