Small boil like blisters under tongue.

I noticed some redness and swelling at the base of my tongue 2 weeks back. It's red and looks swollen. feels itchy and very sore. like skin bruised when I run my tongue over that area. I have used a new mouth wash recently (for 4 days before this redness appeared). That's the new thing I did.I took ibuprofen for 2 days and the redness reduced. Had the mild Swelling for a week. I have burning sensation in the tongue and throat. Don't see any visible blister on the upper side of tongue. But burn or feel very sore on top side of Tongue. Tongue underside veins looks little blue greyish. Looks darker than before. Is that normal? It took more than a week to get that swelling down.I see some very small boil like blisters under the tongue area. I see around 3 small blisters.  Sore and burning sensation on tongue upper side and tip of tongue. 3 boil like very small blisters under the tongue. will this boil go away on its own? attaching day 1 pic and today's picture. will it go away?