Hello, doctor. I had hemorrhoid surgery a month ago, but now I'm experiencing itching in my anus when I go to the bathroom. I find it more comfortable when I squat, but going to the bathroom frequently is a bit uncomfortable. Could you let me know if it's necessary to see a doctor for anal itching one month after hemorrhoid surgery? Thank you very much.

I have a hard lump right in the anal area along with hemorrhoids. There is no bleeding during bowel movements, no pus in the anus, just a hard lump and anal itching. After a bowel movement, I see two small yellow protrusions different from the hemorrhoid color. Please let me know if the hard lump in the anal area is anal cancer or rectal cancer? Thank you for your advice.