what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Mouth ulcers can be caused by a wide range of factors including: 1  accidental biting of the cheek. 2  injury from a toothbrush (such as slipping while brushing) 3  constant rubbing against misaligned or sharp teeth.  constant rubbing against dentures or 1  braces. poor oral hygiene.  burns from eating hot food.