Jock itch is a common fungal skin infection of the groin area caused by the same group of fungi responsible for athlete's foot and ringworm. The medical name is tinea cruris. It is more common in men than women, more likely in warm weather, and especially prevalent among athletes and active people whose skin stays warm and moist for extended periods. Despite how common it is, jock itch is often undertreated or misidentified. Many people also do not realize it is directly related to athlete's foot, and that the two infections can spread back and forth if both are not addressed.

What Jock Itch Is

Jock itch is a dermatophyte infection of the skin in the groin, inner thighs, and sometimes the buttocks. The same fungi that cause athlete's foot (tinea pedis) and ringworm (tinea corporis) cause jock itch. They thrive in warm, moist, enclosed environments and feed on keratin, the protein found in skin. The groin provides exactly the conditions they need: heat, friction, moisture from sweat, and skin surfaces in close contact with each other.

Despite the name, jock itch is not limited to athletes. Anyone whose groin area stays warm and moist for extended periods is at risk, including people who are overweight, people who sweat heavily, and anyone who spends long hours in tight or non-breathable clothing.

Symptoms

Jock itch typically begins as an itchy, red or discolored rash at the inner crease of the groin. It often spreads outward in a roughly ring-shaped pattern with a raised, scaly border and a somewhat clearer center. Common symptoms include:

• Itching, burning, or chafing in the groin area
• A red, pink, brown, or discolored rash depending on skin tone
• Scaling, flaking, or peeling skin
• A rash with a distinct border that may look ring-shaped
• Skin that appears cracked or raw in severe cases
• The rash spreading to the inner thighs or buttocks

Jock itch generally does not affect the scrotum or penis, which helps distinguish it from other groin conditions. If the rash involves those areas, a different diagnosis is more likely and medical evaluation is appropriate. Similarly, a rash in the groin that does not have a distinct advancing border or that is not responding to antifungal treatment may not be jock itch and is worth having evaluated.

How Jock Itch Spreads

Jock itch spreads through direct contact with the fungi that cause it. The most important transmission routes for most people are:

From athlete's foot on the same person

This is the most overlooked transmission route. The fungi that cause athlete's foot and jock itch are the same organisms. A person with athlete's foot can spread the infection to their own groin by touching their feet and then touching the groin, or more commonly, by pulling underwear or pants up over infected feet while still damp. The fungi hitch a ride on the fabric and establish themselves in the warm, moist groin environment. This is why treating athlete's foot and jock itch together matters. Clearing one while the other persists makes recurrence much more likely.

Contaminated clothing and towels

Wearing underwear or athletic gear that has not been properly laundered, or sharing towels with someone who has an active infection, can transfer the fungi directly to the groin area.

Skin-to-skin contact

Direct skin contact in close-contact sports or intimate contact can transfer dermatophytes from one person to another. In wrestling and BJJ environments, groin contact during training is a legitimate transmission route.

Risk Factors

Jock itch is more likely when:

• You sweat heavily, particularly in the groin area
• You wear tight, synthetic, or non-breathable underwear or athletic gear
• You have an active athlete's foot infection
• You are overweight, as skin folds create warm, moist environments where fungi thrive
• You participate in contact sports where shared gear and close skin contact are common
• Your immune system is compromised
• You share towels or clothing with others
• You train or work in hot, humid conditions

Treatment

Many cases of jock itch respond to OTC antifungal treatment when used consistently for the full labeled treatment period. As with other tinea infections, symptoms often improve before the infection is fully cleared. Stopping treatment early is the most common reason jock itch returns.

OTC antifungal options

Common OTC antifungal ingredients for jock itch include clotrimazole, miconazole, terbinafine, butenafine, and tolnaftate. Creams are often the most practical format for jock itch because they allow direct application to the affected skin. Sprays can be useful for sensitive or hard-to-reach areas. Always follow the label directions for the specific product you are using. For a detailed breakdown of how each antifungal ingredient works, see our Antifungal Ingredients Guide.

Treatment duration

For jock itch, OTC antifungal treatment is often used for two weeks, though some products and ingredients have different labeled treatment periods. Terbinafine-based products may have shorter treatment periods than clotrimazole or tolnaftate-based products. Follow the product label and complete the full treatment period.

Medicated antifungal soap

Defense Antifungal Medicated Bar Soap contains tolnaftate 1% and is an FDA-registered OTC drug product labeled for the treatment of most jock itch when used as directed. It can be used during showering as part of the cleansing routine alongside a topical antifungal cream applied directly to the affected area.

Treat athlete's foot at the same time

If you have both jock itch and athlete's foot simultaneously, treat both at the same time. Clearing the groin infection while athlete's foot remains active on the feet creates a persistent source for reinfection. Use separate towels for your feet and your body during treatment and dry your feet last to avoid transferring fungi to other areas.

Keep the area clean and dry during treatment

Applying antifungal treatment to skin that stays damp reduces its effectiveness. Change into clean, dry underwear at least once daily during treatment, choose loose-fitting cotton or moisture-wicking fabrics over tight synthetic materials, and dry the groin area thoroughly after showering before applying any topical treatment.

How to Help Prevent Jock Itch

• Treat athlete's foot promptly and completely. Because jock itch so commonly originates from athlete's foot on the same person, keeping feet clear of fungal infection is one of the most important ways to help prevent jock itch. Putting on socks before underwear when dressing can help reduce the chance of transferring fungi from the feet to the groin via clothing.
• Keep the groin area dry. Dry thoroughly after showering, including skin folds and the inner groin. Moisture left in these areas creates the conditions fungi need to establish an infection.
• Choose breathable clothing. Loose-fitting, breathable underwear and athletic gear reduce the sustained heat and moisture that allow fungi to thrive. Avoid wearing tight synthetic materials for extended periods, especially during or after exercise.
• Change out of wet or sweaty clothes promptly. Do not sit in damp workout clothes or wet swimwear longer than necessary. The groin area is particularly susceptible to fungal growth when moisture is trapped against the skin for extended periods.
• Do not share towels or clothing. Shared personal items are a direct transmission route for jock itch.
• Shower after training. Showering after training, mat time, or exercise removes sweat and possible contaminants from the skin. Defense Bar Soap and Defense Shower Gel are built around pharmaceutical-grade tea tree and eucalyptus essential oils known for their natural antifungal properties and support a thorough post-training cleansing routine.
• Wash athletic gear after every session. Underwear, compression shorts, and training gear should be washed after every use. Reusing damp gear is a common contributing factor to persistent or recurring jock itch.

For a complete guide to skin infection prevention specific to combat sports, see How to Prevent Skin Infections in Combat Sports.

When to See a Doctor

See a medical professional if:

• The rash involves the scrotum, penis, or vaginal area, as jock itch does not typically affect these areas and a different condition may be present
• The infection is not responding to OTC antifungal treatment after the full labeled treatment period
• The rash is spreading rapidly or covering a large area
• There are signs of bacterial infection such as pain, significant swelling, warmth, or drainage
• The infection keeps returning after completing full treatment courses
• You are not sure whether the rash is jock itch or another condition

Frequently Asked Questions

Is jock itch contagious?

Yes. Jock itch can spread through direct skin contact with an infected person, through shared towels or clothing, and from other parts of your own body, particularly the feet. During an active infection, avoid sharing towels or clothing and practice good hygiene to reduce the risk of spreading the infection to training partners or household members.

Can women get jock itch?

Yes, though it is more common in men. Women can develop tinea cruris in the groin and inner thigh area under the same conditions that cause it in men. The anatomy of the groin creates slightly less of the warm, enclosed environment that promotes fungal growth in women, but the same risk factors apply: heat, moisture, tight clothing, and contact with the causative fungi.

Why does my jock itch keep coming back?

The most common reasons for recurrence are stopping treatment before the infection is fully cleared, having an untreated or undertreated athlete's foot infection that continues to reinfect the groin, and ongoing exposure through clothing or shared items. Putting on socks before underwear when dressing, treating both jock itch and athlete's foot simultaneously, and choosing breathable clothing are the most important practical steps for breaking the cycle.

Can I train with jock itch?

Because jock itch can spread through skin contact, training in contact sports while you have an active infection creates transmission risk for your training partners. The practical guidance is to keep the area covered, start appropriate antifungal treatment promptly, and consult your athletic trainer or physician about when it is appropriate to return to close-contact training. Avoiding close-contact training and shared athletic environments during an active infection is the safer approach.

How is jock itch different from a yeast infection in the groin?

Both are fungal infections but they are caused by different organisms. Jock itch is caused by dermatophytes, the same group responsible for athlete's foot and ringworm. Yeast infections in the skin are caused by Candida species. The two can look similar, but they respond to different antifungal ingredients. Clotrimazole and miconazole are effective against both dermatophytes and Candida. Tolnaftate and terbinafine are primarily used against dermatophytes and are not the preferred OTC options when Candida is the concern. If OTC treatment for jock itch is not working, it is worth discussing with a physician whether a yeast infection may be involved.

Is jock itch related to athlete's foot?

Yes. They are caused by the same group of fungi, and many people who develop jock itch already have athlete's foot. The most common way jock itch originates is from an existing foot infection spreading to the groin through clothing or touch. Treating them together and addressing the foot infection helps reduce the risk of reinfection.

This article is for educational purposes only and is not medical advice. For diagnosis or treatment guidance, consult a qualified healthcare professional. See our full disclaimer.