Red birthmark and hemangioma can be distinguished from each other in several aspects, such as shape, development trend, and whether there is discoloration after pressing. 1. Shape: the surface of red birthmark is flat, while the surface of hemangioma is uneven, and the edge is usually irregular, such as spongy, earthworm, etc. Some hemangiomas will be higher than the surface of the skin, and some hemangiomas will also pulsate with the heartbeat. 2. Development trend: red birthmarks are usually found when newborns are born, and their shapes will not change and grow up proportionally with the patient’s body. However, hemangioma is different, which usually fades away after several years, or develops rapidly and the area increases obviously, and can even increase dozens or hundreds of times in a short time. 3. Whether there is color change after pressing: red birthmark has no obvious change after pressing. The color of hemangioma is mostly bright red or dark red, and it will fade to be similar with the surrounding skin after pressing with hands, and the color will return to the original color and size quickly after letting go. It is recommended that patients find red birthmarks or hemangiomas and go to the hospital in time for specialist treatment.