The term 'cause inflammation in' can be completed by two crossword solutions: STYE (4 letters) and IRITIS (6 letters). A STYE is an infection of the eyelid caused by bacteria, usually resulting in a red, swollen bump. Iritis is an inflammation of the iris, the colored part of the eye, which can cause pain, redness, and blurred vision. Both conditions can be treated with antibiotics or other medications.