Nipple flow rate affects how fast milk comes out. Wrong flow causes problems: Too slow = frustration, long feeds, giving up. Too fast = choking, gulping, gas, overfeeding, bottle preference over breast. Flow levels: Preemie/newborn (slowest), Level 1 (slow, 0-3 months), Level 2 (medium, 3-6 months), Level 3+ (fast, 6+ months). Breastfed babies should usually stay on slow flow longer. Nipple shape also matters: Standard, wide-base (like breast), orthodontic, angled. May need to try different brands to find what baby prefers.

Engorgement: Breasts become overly full, hard, painful, and swollen (usually days 2-5 postpartum when milk comes in). Makes latching difficult for baby. Normal engorgement resolves in 24-48 hours with frequent feeding. Mastitis: Breast infection, often starts with clogged duct. Symptoms: Red, hot, painful wedge-shaped area on breast, fever >101°F, flu-like aches, chills. Requires antibiotics. Mastitis is urgent - untreated can lead to abscess. Usually affects one breast, most common in first 3 months of breastfeeding.

Newborns typically breastfeed every 2-3 hours (8-12 times in 24 hours). Feed on demand when baby shows hunger cues. Cluster feeding (every hour) is completely normal, often followed by a longer 4-5 hour sleep. Signs baby is eating enough: growing well and producing plenty of wet diapers.