The salmon patch, also known as stork bite, angel's kiss, nevus simplex, and erythema nuchae, is the most common vascular lesion seen in infants of all races and ethnicities (20%-60%), usually at birth. The nape of the neck and occiput are the most common sites, but facial, scalp, and sacral lesions are frequent. The trunk and limbs are less often affected. There may be multiple lesions. Lesions enlarge in proportion to the child's growth. Facial lesions generally fade within 1-2 years, whereas those at other sites, especially nuchal, persist into adulthood.

A variant of the salmon patch known as the butterfly-shaped mark can occur in the sacral region. Sacral lesions may be associated with spinal dysraphism, tethered cord, lipomeningocele, or diastematomyelia, usually when another skin defect occurs (a dimple, sinus, swelling, excess hair, nevus, or skin aplasia).