Penis Redness: Causes and What to Do

What penis redness looks like

Redness may be patchy, spotty or uniform, and it may itch, burn or feel sore. Doctors use these terms:

• Balanitis: inflammation of the glans
• Posthitis: inflammation of the foreskin
• Balanoposthitis: both together, the usual pattern in uncircumcised men

Balanitis affects up to about 1 in 10 men at some point. It is less common in circumcised men because there is no warm, moist space under the foreskin.

Common causes

Yeast infection

Candida is the most common infectious cause. It thrives in warm, moist skin and is more likely if you have diabetes (sugar in urine feeds yeast), have recently taken antibiotics, or have a partner with a vaginal yeast infection. The glans looks red and shiny, sometimes with pinpoint spots or a white coating, and itches or burns.

Irritation and allergy

Washing too often with soap, especially under the foreskin, is a frequent cause. Shower gels, bubble baths, wipes, latex, spermicides and some lubricants can trigger contact dermatitis. Friction from sex or masturbation without enough lubrication can leave the skin red and sore for a day or two.

Can redness on the penis come from stress or heat?

Heat and sweating can cause redness indirectly. Hot weather, tight underwear and exercise trap moisture, causing chafing and making yeast infection more likely. Stress does not directly redden the penis, but it can trigger flares of eczema or psoriasis and outbreaks of genital herpes. Temporary redness after arousal or a hot shower is normal, from increased blood flow, and fades within minutes to hours.

Skin conditions

Eczema, psoriasis, lichen planus and lichen sclerosus can all affect the penis. Zoon's balanitis causes a persistent, shiny, orange-red patch on the glans in older uncircumcised men. Fixed drug eruption causes a round red or dusky patch that comes back in the same place each time a particular medicine is taken, such as some antibiotics or NSAIDs.

Sexually transmitted infections

• Gonorrhea, chlamydia, trichomonas and Mycoplasma genitalium: discharge and burning on urination, with redness at the tip
• Genital herpes: groups of small, painful blisters that burst into shallow sores
• Syphilis: a painless, firm sore, then sometimes a rash

Less common but important causes

• Precancerous patches: penile intraepithelial neoplasia (also called erythroplasia of Queyrat) is a velvety, red, persistent patch on the glans, more common in older uncircumcised men. It is linked to HPV, smoking and lichen sclerosus and needs a biopsy.
• Phimosis: a tight foreskin traps moisture and causes repeated balanitis, and repeated balanitis can scar the foreskin and tighten it further.
• Reactive arthritis: painless red patches on the glans with eye inflammation and joint pain after an infection.

How a doctor finds the cause

You may be asked about new products, sexual partners, recent antibiotics, diabetes, and how often you wash. The doctor will examine the penis, foreskin and groin. Tests can include:

• swabs for yeast, bacteria and STIs
• a urine test for sugar to check for diabetes
• STI tests if there is any risk
• a skin biopsy if redness persists despite treatment or looks like a precancerous patch

Treatment and home care

Self-care for mild redness

• Wash once a day with warm water only, gently pulling back the foreskin if it retracts easily. Rinse and dry carefully.
• Use an emollient or soap substitute instead of soap.
• Avoid perfumed products, wipes and powders.
• Wear loose cotton underwear, and change out of sweaty clothes promptly.
• Pause sex until it settles, and use plenty of lubricant afterward.
• Do not forcibly pull back a tight foreskin, especially in boys.

Medical treatment

• Yeast infection: an antifungal cream such as clotrimazole, available over the counter. Follow the label. A partner with symptoms should also be treated.
• Inflammation and dermatitis: a mild steroid cream, sometimes combined with an antifungal, for a short time.
• Bacterial infection: antibiotic cream or tablets.
• STIs: specific antibiotics or antivirals, with partner notification and testing.
• Skin diseases: targeted creams for psoriasis, lichen sclerosus or lichen planus.
• Recurrent balanitis or scarring: circumcision is sometimes recommended.

Frequently asked questions

Why is the head of my penis red?

The most common reasons for a red glans are a yeast infection, irritation from soap or friction, and moisture trapped under the foreskin. Psoriasis, eczema and STIs are other causes. If gentle washing and avoiding irritants do not help within a week or two, see a doctor.

Can redness in the penis be from stress or heat?

Heat and sweat can cause chafing and encourage yeast, which leads to redness. Stress does not cause redness directly but can trigger eczema, psoriasis or herpes outbreaks. Brief redness after arousal or a hot shower is normal and fades quickly.

Is penis redness an STI?

Usually not. Most redness is from yeast, irritation or skin conditions. STIs are more likely if there is discharge, burning on urination, blisters, sores, or a new sexual partner. Testing is the only way to be sure.

How long does balanitis take to heal?

With the right treatment, most balanitis improves within a few days and clears within 1 to 2 weeks. If it lasts longer or keeps coming back, a doctor should check for diabetes, skin diseases, a tight foreskin or a persistent patch that needs a biopsy.

Can I use athlete's foot cream on my penis?

Clotrimazole and miconazole creams sold for athlete's foot or thrush can treat yeast on the penis. Avoid strong steroid creams, harsh products and anything with alcohol or fragrance unless a doctor advises it. If unsure of the cause, get it checked first.