A really small white patch was discovered on my tongue during my scheduled dental cleaning. Had it excisional Biopsied and it came back a mild to moderate dysplasia. The biopsy was done 4 weeks back. It was healing ok. But the part where there is the cone formation of it seems to not be healing well. the patch sometime turns red ,purplish. Also some of the white part is coming back. How much time does a Oral Biopsy take to heal completely?I have never smoked or drank.35 yrs old.Will appreciate any help