Category ratings defined. Test instruments are rated on their ability to withstand a voltage spike, which is applied through a specified level of resistance (Table). The ratings are broken down by categories â CAT I, II, III, and IV.
Burning Mouth and Tongue. Burning tongue is an odd sensation in the tongue and mouth that most commonly affects women who are entering or going through menopause. Though researchers are not sure what causes it, several suspects include irritating dentures, nerve damage, or hormonal imbalances.
Tongue inflammation is one such condition. Tongue inflammation occurs when the tongue becomes swollen and possibly discolored. This can make the tongue appear as if itâs smooth. Other names for tongue inflammation include tongue infection, smooth tongue, glossodynia, glossitis, and burning tongue syndrome.