My daughter has this on two of her finger nails and two of her toe nails.
She is dairy allergic and is calcium deficient.
I've read that the pitting in the nails could be a sign of her calcium deficiency or low iron levels.
We find out next week the results of blood tests for iron and other bits and I aim to check with her consultant about her nails too.
She is also losing hair (shes only 5) and I read that they can be linked with pitting nails.
Also my son was born with and still has spoon shaped nails on his toes, I was told nails can be a sign of health errors but told not to worry about it, when he was 5mo old we found by sheer fluke that he had a serious very rare liver disease, he's 21 now.
Of course all kids are different, I would guess that the pitting may be a sign that your son has what you already know, his health issues.
I'm not very helpful am I? Lol
I'll let you know what hospital says next week tho.
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