Hello, I'm an expert in dermatology with a focus on skin conditions and their characteristics. Let's delve into the question of why a birthmark might grow hair.

Hair growth on a birthmark is not uncommon and can be attributed to the type of birthmark present. Birthmarks are essentially areas of skin with a higher concentration of certain skin cells, such as melanocytes (pigment-producing cells) or blood vessels. When a birthmark contains hair follicles, it can result in hair growth. This is particularly true for certain types of birthmarks like:


1. Nevus - A type of mole that can have hair growth if it includes the dermis layer of the skin where hair follicles are located.

2. Vascular birthmarks - These are not typically associated with hair growth, but if they are large or deep enough, they might include hair follicles.

3. Pigmented birthmarks - Some of these may also grow hair if they are a type that involves the dermis.

It's important to note that not all birthmarks will grow hair, and the presence of hair can sometimes be an indicator of the type of birthmark or its depth. If you have concerns about a birthmark that is growing hair, it's always a good idea to consult with a dermatologist. They can provide a proper evaluation and discuss any potential treatments or monitoring that may be necessary.

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When a bunch of the cells that gives our skin color (or melanocytes) end up in the same place, they form hyper-pigmented patches of skin that we call moles. Because of all this pigment, any hair that grows out of a mole can be darker and coarser��and even grow faster than the rest of your body hair.read more >>