I noticed this morning that 12YO DS has a white spot on five of his fingernails. He's had a massive growth spurt recently and they seem to have come on quite suddenly. Is this something I should take him to the GP about? He's generally fit and well but we did take him for a blood test earlier in the year as he tends to get really dark and puffy under his eyes all the time. The only thing it showed was a folate deficiency which he now takes a supplement for. Should I bring him back to get seen again?