Where do birthmarks come from?

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Where do birthmarks come from?

In: Biology

20 Answers

Anonymous 0 Comments

The short answer is that there are many types of birthmarks with different causes. Some are related to unusual areas of skin pigment, some are due to unusual blood vessel structures, some are from differences in the layer of fat below the skin and many more.

This site has a lot of information, but in pretty technical terms. https://dermnetnz.org/topics/congenital-naevi/

Anonymous 0 Comments

There are 2 types of birthmarks: pigmented birthmarks and vascular birthmarks. Pigmented birthmarks are caused by excess skin pigment cells. Vascular birthmarks are caused by increased blood vessels. Birthmarks are a result of a localized imbalance in factors controlling the development and migration of skin cells.

Source: [Wikipedia](https://en.wikipedia.org/wiki/Birthmark)

Anonymous 0 Comments

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Anonymous 0 Comments

I do know that for one congenital condition, neurofibromatosis, it can be common to have a coffee colored birth mark on your body. It could be anywhere, any shape. Not in all cases, but if it runs in the family, like it does in mine, you can let the doctor know that you have the birthmark and that it runs in your family. I had some genetic testing done, as well as my daughter, and found we are both genetic carriers. My grandmother, her twin, my uncle and my aunt had it severely. I don’t know what, if any, other congenital conditions may be linked to birthmarks.

Anonymous 0 Comments

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Anonymous 0 Comments

When the skin cells develop and start multiplying to cover the fetus in the uterus, there can be a genetic change in one of the cells for whatever reason. Any daughter cells from that cell would have the same genetic change, and that results in a group of cells that are slightly different from all other skin cells. That results in a birthmark.