adil_minhas
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Cracking and splitting can also be caused by a fungal infection or thyroid disease, particularly hypothyroidism. Brittle nails may also be due to a deficiency in vitamins A and C or the B vitamin biotin.
You will never know the problem till you keep nibbling at the nails, once they grow you will be able to identify the problem. This is what the Doc will tell you.
In any case , what are you anxious about ? Biting nails will not solve anything.
My nails are perfectly healthy. They have grown out a few times so I know.
Its not anxiety. Its just something to do. I used to bite my nails less when I used to smoke. Now I have quit and it has increased. I do it absent mindedly. And once I get a small piece, I like to trim evenly all around it ....