Thanks for writing to us.
Since the white lumps exists even after administration of nystatin,the lump can be of aphthous ulcer type.
Avoid spicy foods,tobacco chewing
has to be administered in such condition.
Meanwhile,maintain oral hygiene well.
Floss your tongue daily.
mouthrinses to gargle.
Vitamin becosules as well as iron supplements
has to be administered.
Take fluids as well as nutritious diet.
Hope this helps.