Baby acne appears as small red or white bumps on face (cheeks, forehead, chin). Develops around 2-4 weeks old, caused by maternal hormones still in baby's system. Looks like teenage acne but smaller. Completely normal and common (affects 20-40% of newborns). Usually resolves on its own by 3-4 months without treatment or scarring. Not caused by poor hygiene.

Newborns only need 2-3 baths per week (daily baths can dry skin). Sponge baths until umbilical cord falls off (1-3 weeks), then can do tub baths. Bath temperature: 98-100°F (lukewarm, not hot). Test with elbow or bath thermometer. Room should be warm (75°F+) to prevent chilling. Keep baths short: 5-10 minutes max. Use gentle, fragrance-free baby soap sparingly - water alone is fine for most of body.

Birthmarks are very common - about 80% of babies have some type. Most are harmless and don't need treatment. Common types: Mongolian spots (blue-gray patches, common on darker skin tones, fade by school age), Stork bites/Salmon patches (pink patches on eyelids, forehead, neck - fade by age 2), Café au lait spots (light brown, usually permanent but harmless), Strawberry hemangiomas (bright red raised bumps, grow first year then shrink), Port wine stains (flat pink-red marks, usually permanent). Most birthmarks are just cosmetic. Some types (hemangiomas near eyes/airways, multiple café au lait spots) need monitoring.