This start after i clear my face from acne..

First time I using retonoic acid, actually small amount (less than recomendation) of RA makes my facial skin very sensitive to uv (only feel little bit itchy on the same night when i use it).. i used it maybe about 2 month

one night, i try to use it as much as recommendation amount.. but in the next day i found that my face feel stinging and burning that i never feel before.. i suggest it because of sun exposure.. i stop using all product, just moisturize and re apply sunscreen.. even i cant wash my face with mild cleanser because it still sting my face.after 2 days, my face feel less sting and burning..

but i realize that on stinging area, i can find a spider vein formation.. i suggest it caused by sun damage.. anyone have some different idea?

and i still on recovery from this irritated skin, may be you can give me advice what should i DO and DONT for my facial skin?