- Seborrheic dermatitis is most often seen in newborns and infants up to 6 months of age.
- Seborrheic dermatitis typically resolves by 6–12 months of age.
- Severe seborrheic dermatitis may be associated with immunocompromised diseases.
- The scalp is itchy and sheds white, oily skin flakes. When severe, the scalp can have dense, thick, adherent yellow scale and crust.
- One or more of the following areas has patches of red, scaly skin: the scalp, hairline, forehead, eyebrows, eyelids, creases of the nose and ears, ear canals, breastbone, midback, groin, and armpit. In people with darker skin, some of the areas might look circular or lighter in color.
- Mild – only some flaking and redness in a few small areas.
- Moderate – several areas affected with bothersome redness and itch.
- Severe – large areas of redness, severe itch, and unresponsive to self-care measures.
- Frequent (daily) shampooing or a longer lather time.
- Consider using shampoos containing ketoconazole, selenium sulfide, 2% pyrithione zinc, or salicylic acid or tar-based shampoos. Sometimes one will work well for a time and then become less helpful; then, it may help to switch to a different type.
- Eyelid changes (blepharitis) can often be managed by gentle cleaning of the edges of the eyelids, by the lashes, with Q-tips® and baby shampoo.
Some over-the-counter creams will help if the medicated shampoo is not quite good enough. These can be added to the shampoo; use until you notice improvement, and then use should be discontinued. These include:
- Creams that reduce the Pityrosporum yeast (clotrimazole, miconazole, terbinafine)
- Hydrocortisone cream may work rapidly but may be less helpful if used for a long time.