While 内炎 itself translates as "inner flame," it can suggest an inflammation of something internal, as seen in 口内炎 (mouth ulcer/stomatitis), 内耳炎 (inflammation of internal ear), etc., so depending on the context, also consider the possibility of 内炎 relating to 炎症
内炎 Word connotations/associations
While 内炎 itself translates as "inner flame," it can suggest an inflammation of something internal, as seen in 口内炎 (mouth ulcer/stomatitis), 内耳炎 (inflammation of internal ear), etc., so depending on the context, also consider the possibility of 内炎 relating to 炎症