Circumcision offers several measurable health benefits, including a roughly 50% to 60% reduction in the risk of acquiring HIV through heterosexual contact, lower rates of urinary tract infections in infancy, and reduced risk of penile cancer later in life. The American Academy of Pediatrics concluded in its most recent policy statement that the health benefits of newborn male circumcision outweigh the risks, though it stopped short of recommending the procedure for all newborns, leaving the decision to families.
Lower Risk of HIV and Other STIs
The most extensively studied benefit of circumcision is its effect on HIV transmission. Three large randomized controlled trials conducted in sub-Saharan Africa found that circumcision reduces the risk of female-to-male HIV transmission by 50% to 60%. Those findings were strong enough that the World Health Organization endorsed voluntary medical male circumcision as a public health strategy in 2007.
The protection extends beyond HIV. The same clinical trials showed that circumcision also reduced rates of high-risk genital HPV infection and genital herpes. HPV is significant not only because it causes genital warts but because certain strains drive the development of several cancers, including penile cancer and cervical cancer.
Why Removing the Foreskin Reduces Infection
The inner surface of the foreskin is lined with a thin, moist tissue similar to the lining of the mouth or the inside of the eyelid. This tissue contains a high concentration of immune cells that normally help fight off pathogens. When exposed to large amounts of a virus like HIV, however, these immune cells can become overwhelmed. Instead of neutralizing the virus, they end up carrying it to nearby lymph nodes and spreading the infection throughout the body. Removing the foreskin eliminates this vulnerable entry point and exposes the remaining skin to air, which causes it to thicken and become a more effective barrier.
Fewer Urinary Tract Infections in Infants
During the first year of life, circumcised boys develop urinary tract infections at significantly lower rates than uncircumcised boys. A study published in the journal Pediatrics found that UTIs occurred in about 1 in 47 uncircumcised infants (2.15%) compared to 1 in 455 circumcised infants (0.22%), a roughly ninefold difference. While UTIs in infants are treatable, they can sometimes lead to kidney infections that require hospitalization, so the reduction is clinically meaningful even though the overall numbers are relatively small.
Reduced Penile Cancer Risk
Penile cancer is rare, but circumcision lowers the risk through two mechanisms. First, it reduces the likelihood of persistent HPV infection, which is a known driver of penile cancer. Second, it eliminates the possibility of phimosis, a condition where the foreskin becomes too tight to retract. Longstanding phimosis leads to chronic irritation and inflammation underneath the foreskin, which over time increases cancer risk. Men who were circumcised as newborns essentially remove both of these risk factors from the equation.
Benefits for Female Partners
Because circumcision reduces a man’s likelihood of carrying HPV, it also lowers the risk for his female sexual partners. A systematic review and meta-analysis published in JCO Global Oncology found that women whose male partners were circumcised had about 35% lower odds of developing cervical cancer compared to women whose partners were uncircumcised. The protective association held across different stages of disease, including precancerous cervical changes and invasive cervical cancer.
Easier Hygiene and Prevention of Foreskin Problems
The foreskin creates a warm, moist pocket where dead skin cells, oils, and bacteria naturally accumulate. This buildup, called smegma, requires regular cleaning by retracting the foreskin and washing underneath it. For most men, this is straightforward. But for those who develop phimosis and physically cannot retract the foreskin, proper cleaning becomes impossible, and smegma buildup can lead to infection and inflammation of the head of the penis, a condition known as balanitis.
Circumcision permanently resolves phimosis and eliminates the risk of paraphimosis, a painful emergency where a retracted foreskin gets stuck behind the head of the penis and cuts off blood flow. For men who experience recurrent balanitis or problematic phimosis, circumcision is considered the definitive surgical treatment in the United States.
What the Procedure and Recovery Look Like
For newborns, circumcision is a brief procedure typically performed within the first few days of life. Babies generally recover within about 10 days. During healing, the penis will look swollen and red, and a yellowish film may appear at the tip. This is normal and part of the healing process. Adult circumcision involves a longer recovery, often a week or more, and is usually performed under local or general anesthesia.
The American Academy of Pediatrics’ position is that the benefits are significant enough to justify insurance coverage and access to the procedure for families who want it, but not so overwhelming that circumcision should be universally recommended. In practical terms, this means the decision rests with parents, informed by their own values, cultural considerations, and the medical evidence outlined above.