STDs and STIs, bacterial infections can still affect the partner who is performing the act. Always exercise good hygiene and remember to put on a fresh condom before switching to vaginal intercourse. Delicate anal tissue: Although the skin around your anus is tougher and provides a barrier against infection, the soft tissues inside the anus are thin and delicate. Penetration can result in trauma like anal fissures or tears, and even bleeding – making you more vulnerable to viruses and bacteria. Lack of lubrication: Unlike the vaginal canal, your anus doesn’t produce a natural lubricant for sex. Therefore, practicing safe anal sex includes using some form of over-the-counter lubrication. Failure to do so may cause pain, injury, or bleeding after penetration. Aggravation of hemorrhoids: Anal sex isn’t usually linked to the formation of new hemorrhoids. However, the stretching and pushing might cause internal or external flare-ups, worsening symptoms such as itching, swelling, and discomfort. Colon damage: Though it’s rare, anal penetration could potentially puncture your colon and require surgery. Consult with your doctor immediately if you notice heavy rectal bleeding and abdominal pain after participating in anal sex.