Baby neck redness is very common during infancy and is often caused by moisture and friction in the skin folds, especially from drool, milk, sweat, or heat, a condition often referred to as intertrigo. Mild cases usually improve with gentle cleaning, thorough drying, loose breathable clothing, and changing wet bibs or clothes promptly, while avoiding harsh or fragranced products. However, redness can also be caused by heat rash, eczema, seborrheic dermatitis, yeast or bacterial infections, so parents should seek medical advice if the rash becomes painful, swollen, warm, spreads quickly, develops pus, sores or a bad smell, is accompanied by fever, or does not improve with gentle care.
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