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It's actually only certain drugs that are part of the chemo process that cause alopecia; when I was having chemo years ago, the doctors told me which of the drugs would cause the hair loss and which wouldn't (being 13 at the time, I asked them to just leave out the hair loss ones :P)...

I'm not sure of the specifics, but from what I understood of what they told me, the hair loss was basically the result of the same kind of thing most of the side effects of chemo are the result of - the fact that the drugs kill good cells in the body as well as bad ones.

Not everyone who has chemotherapy loses all their hair, though - I lost about two-thirds of mine, but still had a decent coverage of hair on my head despite having been given the usual doses of the particular drugs that cause hair loss.

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12y ago
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13y ago

Chemotherapy prevents your body from creating new cells. Because your body becomes unable to create new hair cells, when the old hair cells die there is nothing to keep them attached to your head, so your hair falls out.

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Q: Why does chemotherapy make your hair fall out?
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Very probably no; but the chemotherapy of cancers imply the hair fall.


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Chemotherapy is used to fight the cancer cells, but in the process it can also be harmful to other cells in your body that these drugs mistake for cancer cells. The way chemotherapy works is that it targets whatever cells are rapidly dividing. For this reason, the cells in your body that make hair grow so fast get harmed along with the cancer cells. Fortunately, the cells that produce your hair ca eventually go back to normal and your hair growth will resume again.


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