A red, swollen glans means the head of the penis, or the inner foreskin, becomes red, swollen, itchy or sore; doctors usually call this balanitis, and when the foreskin is also affected, balanoposthitis. It is not uncommon and most cases are not serious, but the cause needs to be found so it can be treated properly.
Some men notice stinging or itching after a shower; others find a thick discharge or smell under the foreskin, or that the foreskin no longer pulls back easily. When symptoms started and whether they relate to sex or a new cleaning product are useful clues.
Discomfort of the glans can feel awkward to talk about, but it is a common problem in urology clinics. The point is not to keep trying creams bought on your own, but to recognise situations that need immediate care and let a doctor decide on treatment based on examination and tests.
Key points: A red, swollen glans is usually balanitis. Common causes include too little or too much washing, a tight foreskin, thrush (a yeast infection), sexually transmitted infections, and irritation from soap, shower gel or condoms; repeated episodes can also relate to diabetes. Most cases are not emergencies but should be checked to find the cause. If the foreskin gets stuck behind the glans and will not go back, with marked swelling and pain, go to an emergency department straight away.
What is a red, swollen glans, and what are the symptoms of balanitis?
Common signs of balanitis include redness, swelling, itching and soreness of the glans; on darker skin the redness may be less obvious. Other possible symptoms include a thick discharge under the foreskin, an unpleasant smell, bleeding around the foreskin, or a foreskin that does not pull back easily.
Some men also have stinging when passing urine; see Painful urination. If there is also discharge from the urethral opening, urethritis or a sexually transmitted infection should be assessed as well.
Does a red, swollen glans mean a sexually transmitted infection?
Not necessarily. Common causes of balanitis are washing habits, a tight foreskin or thrush, and it may simply be a reaction to soap, shower gel or condoms. A sexually transmitted infection is only one possibility and is judged from symptoms and exposure history.
What are the common causes of a red, swollen glans?
When washing is not enough, secretions and bacteria build up under the foreskin, which is a common cause of balanitis, especially in men with a long foreskin or phimosis whose foreskin is hard to pull back for cleaning. On the other hand, using a lot of soap or shower gel, or not rinsing it off well, can also irritate the skin and cause redness and swelling.
Thrush (a Candida yeast infection) is another common cause, with redness, burning and itching of the glans and under the foreskin, plus a white, cottage-cheese-like discharge and smell. Thrush is not a sexually transmitted infection, but it tends to come back.
Sexually transmitted infections can also cause a red, swollen glans and discharge, for example gonorrhoea or chlamydia. Clusters of small blisters that break into painful sores suggest genital herpes. Raised growths or a painless ulcer on the glans need to be told apart from conditions such as genital warts or syphilis.
When diabetes is poorly controlled, sugar in the urine can make yeast grow more easily, so if balanitis keeps coming back the doctor may arrange blood sugar tests. Less often it relates to skin conditions such as lichen sclerosus.
Why does a foreskin stuck behind the glans need immediate care?
If the foreskin is pulled back and gets stuck behind the glans, unable to return to its usual position, the glans can quickly swell and hurt. This is called paraphimosis and is an emergency that needs prompt treatment to protect blood flow to the glans. Go to an emergency department straight away and do not force it back yourself.
| Possible cause | Typical features | Possible assessment |
|---|---|---|
| Not enough washing / tight foreskin | Build-up of secretions under the foreskin, smell, redness, foreskin hard to pull back | Physical examination; review of foreskin and washing habits |
| Irritation from soap, shower gel or condoms | Redness and itching after contact, may improve after stopping | Review of cleaning products and contact history |
| Thrush (Candida yeast) | Burning, itching, white cottage-cheese-like discharge, tends to recur | Swab test; blood sugar check if it keeps recurring |
| Sexually transmitted infections | Discharge, stinging on urination, or blisters and sores | Swab test, urine test and STI screening |
| Poorly controlled diabetes | Recurrent balanitis, possibly with thirst and frequent urination | Blood sugar blood tests |
| Skin conditions (e.g. lichen sclerosus) | White patches, thinning skin or a foreskin that gradually tightens | Skin examination; biopsy if needed |
Which tests are used for a red, swollen glans?
Most balanitis can be assessed first from the history and the appearance on examination, with tests arranged when needed to find the type of infection or an underlying cause.
Medical history and physical examination
The doctor will ask when symptoms began, whether there is itching or pain, any discharge or smell, washing habits and products used, recent sex and condom use, and whether you have diabetes or past repeated episodes, and will look at the glans and foreskin.
Swabs and blood tests
The doctor may gently swab the glans or any discharge to check for bacterial, yeast or viral infection; if a sexually transmitted infection is suspected, urine or other screening is arranged according to exposure history. If symptoms are more severe or keep coming back, a blood sugar test may be arranged.
When is a biopsy needed?
If redness lasts a long time, does not improve with treatment, or shows unusual features such as white patches or other skin changes, the doctor may suggest a skin biopsy to check whether it relates to a skin condition or another change that needs treatment.
| Test | Main purpose | Possible limitations |
|---|---|---|
| History and visual examination | Judge likely causes and urgency | Different causes can look alike, so tests may be needed |
| Swab test | Identify bacterial, yeast or viral infection | Results take time and may be affected if treatment has already started |
| STI screening | Confirm whether a sexually transmitted infection is involved | Tests are chosen according to exposure history |
| Blood sugar blood tests | Assess underlying causes such as diabetes | Mainly used for recurrent or more severe cases |
| Skin biopsy | Clarify long-lasting or unusual skin changes | A further test arranged after the doctor’s assessment |
How is balanitis treated, and what helps day to day?
Treatment depends on the cause. Based on the assessment, the doctor may prescribe a mild steroid cream, an antifungal cream or antibiotics; different causes need different medicines, so it is not advisable to keep trying creams bought on your own, which may delay finding the cause or irritate the skin.
If balanitis keeps coming back, does not respond well to medicines, or a tight foreskin makes cleaning difficult, the doctor may discuss with you whether circumcision is suitable and how traditional circumcision is done.
For day-to-day care, wash the penis with warm water every day: adults can gently pull the foreskin back, wash underneath, dry it, then return the foreskin to its normal position. While you have symptoms, avoid soap and shower gel and use plain water or a moisturising cleanser instead; wash your hands before using the toilet or touching the penis.
If you use condoms, you can choose products suitable for sensitive skin. If a sexually transmitted infection is suspected, avoid sex until assessment and treatment are complete, and discuss with the doctor whether your partner should also be checked.
How should a child’s red, swollen glans be cared for?
In young children a tight foreskin that does not pull back is usually normal, so do not force the foreskin back. Gently wash with warm water every day and pat dry, and avoid soap, bubble baths or wet wipes; change nappies often for children in nappies. If there is redness with pain or difficulty passing urine, take the child to a doctor.
When should you seek care promptly for a red, swollen glans?
Most cases of a red, swollen glans can be assessed at a urology clinic, but seek care promptly if:
The foreskin is stuck after being pulled back and will not return, with marked swelling and pain of the glans: go to an emergency department straight away.
You have difficulty passing urine, a thinner stream, or marked pain when urinating.
There are blisters, sores, raised growths, or discharge from the urethral opening.
Redness keeps coming back, does not improve with treatment, or skin changes such as white patches appear.
Symptoms appear for the first time, come with fever, or you have diabetes or reduced immunity.
Long-lasting or repeated balanitis, as well as lichen sclerosus, are associated with a higher risk of penile cancer; so if symptoms persist or keep returning, or a patch or lump does not heal for a long time, have a urologist assess it further.
Mild irritation may improve after stopping the irritant and washing gently, but balanitis caused by infection usually needs targeted treatment. If redness persists, keeps returning or comes with discharge, see a doctor to find the cause.
It depends on the cause. Balanitis from washing habits or irritation is not contagious; if it relates to a sexually transmitted infection, it may be passed on. Avoid sex until assessed, and have your partner checked if needed.
Possibly. Thrush commonly causes burning, itching and a white cottage-cheese-like discharge, but other infections can look similar. Have a doctor confirm it before using medicines, rather than repeatedly applying creams on your own.
While you have symptoms, wash only with warm water or a moisturising cleanser, avoid soap, shower gel and other products that may irritate the skin, and gently pat dry to keep the area dry.
Not necessarily. The doctor will first look for the cause and adjust treatment and washing habits; circumcision is only discussed if episodes keep recurring, medicines do not work well, or a tight foreskin makes cleaning difficult.
You can start with a urologist, who will assess the foreskin, infection and any urinary problems and refer you to a dermatologist if needed. If the foreskin is stuck and will not go back, go to an emergency department straight away.
Medical references
- NHS: Balanitis
- MedlinePlus (U.S. National Library of Medicine): Balanitis
- NHS: Tight foreskin (phimosis)
- NHS: Thrush in men and women
- NHS: Genital herpes
Advice from a urologist
- If the foreskin is stuck after being pulled back and will not return, go to an emergency department straight away and do not force it.
- See a doctor to find the cause of a red, swollen glans rather than repeatedly trying creams bought on your own.
- Wash gently with warm water every day and pat dry; avoid soap and shower gel while you have symptoms.
- If it keeps coming back, tell the doctor whether you have diabetes or another long-term condition so it can be checked if needed.
A red, swollen glans is common and most cases can be managed, but there is more than one cause. Gentle washing, keeping the area dry and early assessment help target treatment and reduce recurrences. If you have redness, itching or pain of the glans, have a urologist assess you in person.
