Leg Birthmarks: Do They Grow with Children? Causes & What to Expect

The answer to that question is: yes

A birthmark on the leg can grow as a child grows, but not all birthmarks will grow. The growth of a birthmark depends on several factors, including its type and location. Some birthmarks, such as Mongolian spots, tend to fade over time, while others, such as port-wine stains, may darken and thicken.

Birthmarks that are located in areas of the body that experience rapid growth, such as the legs, may also grow larger as the child grows. However, the rate of growth of a birthmark is typically slower than the rate of growth of the child's body, so the birthmark may not appear to be getting bigger very quickly.

If you are concerned about the growth of a birthmark on your child's leg, it is important to talk to a doctor. The doctor can assess the birthmark and determine if it is growing too quickly or if there are any other concerns that need to be addressed.