Cafe au lait spots: Can be normal. However if there are more than 6 or increasing in number can be indicative of neurofibromatosis or Albright disease.
Strawberry mark (nevous vasculosis or infantile hemangioma): A capillary hemangioma so doesn't blanch. Can enlarge and even ulcerate. resolve by age 6, but can persist until age 10. May require surgical intervention depending on location.
Port-wine stain (nevous flammeous):Usually on face. Do not blanch. Require laser therapy to remove (earlier the better for best results). If above eye level can be associated with Sturge-Weber syndrome (cerebral atrophy, seizures, glaucoma, vision loss, hemiplegia)
Stork bite (Telangietic nevi): Usually by eyes, nose or back of neck. Blanch. Fade by age 2.
Erythema toxicum (flea bite rash): Occurs in 70% of newborns. Can be any place on body except soles and palms. Resolves in 2-3 days. Can come and go.
Milia: Sebaceous glands. Commonly occur on nose. Resolve spontaneously.
Cradle Cap (seborrheic dermatitis): Scalp is crusty. Combing baby oil on scalp can help.
Mongolian spot: Commonly on buttocks of Asian, Mediterranean, Latin American and African-American babies