Pilonidal Cyst infection and Butt Discoloration help

I went to a doctor and was referred to a surgeon b/c my butt cheek area , the whole surrounding area is very dark and looked infected. I went to my surgeon and he did an office surgery when i got there and told me i had a Pilonidal cyst. Well he took a knife and cut some part of my skin on Thursday and told me to stay in my bathtub with running water and lye 3-4 times a day for my butt to circulate.

However, since he already did the in office surgery a week ago, he noticed that my butt area is not as reddish/black as it was before. Yes i know the area around my butt and genitals is suppose to be darker than your skin but my butt cheeks and the surroudning areas are VERY dark. i am asian male 23 by the way.

When i look at the mirror, my butt cheeks and the area surrounding my butthole is very dark. I asked my doctor would the discoloration go away since most likely it was the pilonidal cyst that caused this and he said most likely not.

Does anyone know what i can do? My butt area looks black and bruised obviously it was from the infection of the pilondial cyst. I didnt went to the doctor 1 -1.5 year ago when i noticed this b/c I was very scared.

I googled and saw some things on anal bleaching but is that for the butt? This is very embarrassing as well for me. I also saw that they say dont use the product if the area is infected and what not so I don't think i should use that. Again, my butt cheeks when i spread a little looks VERY BLACK like i had some BIG bruises there and it looks like it will stay there forever.

Does anyone know what i can do specifically? Thank you.