What happens if you get white discharge from anul opening but has foul smell and is their a home remedy if it is impossible to get doctor appointments as soon as possible?

Anal discharge often is normal mucus and not a significant health problem. However, white or colored discharge often indicates inflammation due to infection (e.g. STDs if at risk), or inflammatory bowel disease, such as proctitis (anal inflammation) due to Crohn's disease or ulcerative proctocolitis. Odor can occur with any anal health problem. See a doctor about this. Good luck.