I am a 22 yr Old female. From last 5-6 months, some white lines appear on my tongue along with stinging pain. It gets more painful when I eat food, even water. I feel tip of my tongue to be swollen and it gets visibly bright red. This gets alright on its own in 4-5 days, then reappears after a gap of few days. Just to add that I am on the medication for acne vulgaris.