the absence of the white half moon also called as lunula is not uncommon and may be a normal variant and there is no need to worry about it. i guess rest of your nail is normal. however it can be associated with low hemoglobin and inadequate diet. treatment is not needed for this condition but underlying condition needs to be treated. there is no direct relation with thyroid disease but you can get yourself tested if you are having symptoms like lethargy constipation weight gain etc. you should also get your hemoglobin tested. focus on a balanced diet with green leafy vegetables fruits etc. hope this helps you and get back if you have any doubts. for further queries consult an internal medicine physician online --> <link>
does the absence of the white half moon on nails indicate a thyroid problem?