Most of the birthmarks will not be eliminated by themselves, and a few can improve with age. 1. Coffee spots and cavernous hemangiomas can increase in size with age, and may also be accompanied by pain, bleeding, itching and other symptoms. Birthmarks that grow on the face will affect the aesthetics and cause patients to have low self-esteem, frustration and depression. Therefore, this kind of birthmark needs to be treated. 2. Mongolian spots may subside naturally when they grow up, and very few of them may last until adulthood. According to clinical data statistics, 75%-95% of patients with capillary hemangioma can have different degrees of self-regression at the age of 5-7 years. Bright red nevus occurring on the occipital region, forehead or bridge of the nose and other parts of the body can recover on its own. In addition, it is recommended that patients whose birthmarks cannot be eliminated on their own go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying their condition.