Superficial infantile hemangiomas grow very rapidly during the first 6 months of life, especially during the first 3-4 months, and continue to grow but at a significantly slower rate from June to October, with peak growth generally occurring from September to December. However, it is still difficult to predict the trend of an individual child because some infantile hemangiomas continue to develop between the ages of 1 and 2 years, especially some “mixed” infantile hemangiomas. Deep infantile hemangiomas are generally found later and have longer growth cycles than superficial infantile hemangiomas. The typical superficial infantile hemangioma begins to fade around the age of 1 year, when the central part of the tumor changes from bright red to dark red, gradually expanding to the periphery and eventually turning grayish white. Sometimes, although the central part of the superficial area begins to recede, the deeper part of the tumor or the edges are still in a proliferative state. When the tumor recedes, it is replaced by some fibrous tissue. When superficial infantile hemangiomas recede, the local skin becomes lax. When deep infantile hemangiomas recede, the local color becomes lighter, the temperature decreases, and the tissue becomes flabby. They recede about 10% per year, about 50% by age 5, about 70% by age 7, and about 90% by age 9. The regression of infantile hemangiomas does not mean that the skin is completely normalized, and about 20% to 50% of infantile hemangiomas have residual skin changes after regression. The characteristic changes are localized capillary dilation, skin wrinkling, mild pigmentation, and minor structural changes; in severe cases, skin laxity, scar formation, and fibrofatty deformation result in significant local structural changes. Most small infantile hemangiomas do not cause cosmetic changes, but some specific areas, such as between the eyebrows, the tip of the nose, and the ears, may have cosmetic changes. Larger areas of infantile hemangioma have a potential risk of scar formation after regression, especially superficial infantile hemangiomas. Ulcer formation can lead to scar formation of varying degrees of severity, depending on factors such as the size and depth of the tumor and the thickness of the skin invaded by the tumor itself.