 [ Symptoms ] what causes very thick nails on 3 of my toes index and middle on left foot and index on right foot nail is very thick and also looks like it could be pulled up from from the nail bed where it connects at the cuticle of the toe no pain or anything like that   just terrible to look at and i am sure there has to be something wrong [ Disease ] i do not know your age or more importantly have any way of seeing your toes and examining you but it may be onychomycosis    a nail fungus see a podiatrist or your primary care medical provider