Foreskin tearing and splitting: causes, treatment and when surgery helps

Tearing can happen in three places: the small band of tissue under the glans (the frenulum), the rim of the foreskin where it narrows, and the inner foreskin skin itself. Each can split when the skin is pulled beyond what it can stretch to, which is why a tear often appears during an erection, during sex or masturbation, or when the foreskin is pulled back firmly. Repeated tearing in the same place suggests that the skin is too tight, too short or too fragile, which is why the cause matters more than the tear itself.

This guide does not describe first aid beyond the advice of the sources, which is to get assessed if bleeding does not stop or there are signs of infection. It also avoids guessing at causes: the same sore spot can come from friction, infection or a skin disease, and only an examination can tell them apart.

The NHS says a tight foreskin (phimosis) is normal in babies and young boys but can affect adults, and that it becomes a problem when there is pain, a weak flow of urine, bleeding or discharge from under the foreskin, or painful erections. In adults a foreskin that was always snug can begin to split when erections or sex stretch it.

• Thrush and diabetes can underlie balanitis: the NHS notes that high sugar in urine can encourage thrush, and NICE CKS suggests an HbA1c blood test in severe or persistent cases.

• Soap, shower gel, perfumed products and some condoms can irritate the skin, according to the NHS.

A clinician will usually look at the penis and ask about symptoms, hygiene products, new medicines, existing skin conditions, sexual history and anything that might affect immunity, as NICE CKS describes for balanitis. Swabs from under the foreskin, an STI screen and blood tests may be arranged where relevant. If lichen sclerosus is suspected, the BAD says the diagnosis is often made by a dermatologist and a small skin biopsy may be taken, especially for an open sore or thickened skin.

Seeing a GP or, for adults, a sexual health clinic is reasonable for the first assessment. NICE CKS lists persistent or recurrent balanitis, persistent phimosis, suspected lichen sclerosus and any suspicious lesion as reasons for referral to a specialist.

Where inflammation or infection is the cause, treatment is typically a mild steroid cream, an antifungal cream or antibiotics, depending on what is found. For a tight foreskin the NHS lists steroid creams or gels to soften it, and surgery if needed. For lichen sclerosus, the BAD describes strong steroid ointment as the first treatment and says it reduces the need for surgery.

When tearing is caused by structure rather than inflammation, procedures are considered. BAUS describes frenuloplasty, which divides the tight frenulum and re-stitches it lengthwise, as treatment for a tight frenulum that hurts or tears. It describes preputioplasty as widening the foreskin at its tightest point, a dorsal slit as a single cut along the length of the foreskin that avoids removing tissue, and circumcision as the option if those do not solve the problem. The leaflets give anaesthetic options that include local anaesthetic for frenuloplasty, and general, spinal or local anaesthetic for a dorsal slit.

• BAUS says frenuloplasty carries a risk of failure leading to circumcision of between 1 in 10 and 1 in 50 patients.

• A dorsal slit can leave a less pleasing appearance than circumcision, and circumcision may be needed later, according to BAUS.

• After any of these procedures the BAUS leaflets advise avoiding sex and masturbation until the wound heals, up to four weeks.

Self-care is for comfort while a cause is investigated. It is not a substitute for assessment when tearing recurs.

• Wash daily with water or an emollient, avoiding soap and shower gel, as the NHS advises for balanitis.

• Pull the foreskin back only as far as is comfortable and put it back afterwards; the NHS advises this for adults with a tight foreskin and says never to force a child's foreskin.

• Use lubricant for sex if friction is a problem, which the BAD suggests in lichen sclerosus.

• Avoid perfumed soap, talc and deodorants on the penis, as the NHS notes they can irritate.

• If you use emollients, take care around naked flames, because they can make fabrics catch fire more easily.

Call 999 or go to A&E if the foreskin is pulled back and cannot go back over the end of the penis, since the NHS describes paraphimosis as a medical emergency. Do not drive yourself. The NHS says to see a GP for bleeding around the foreskin, a thick discharge, an unpleasant smell, or pain when passing urine. After circumcision the NHS lists bleeding that does not stop, a red or warm wound, high temperature and difficulty passing urine as reasons for an urgent GP appointment or NHS 111. A persistent ulcer, lump or thickened patch should be checked, as the NHS lists these as warning features in people with lichen sclerosus.