That itchy, red patch creeping up your inner thigh after a workout? It’s probably jock itch, and it’s more common than most people realize. Jock itch causes a lot of awkward silence, but there’s nothing to be embarrassed about, it’s just a fungal infection, and it’s treatable. This guide covers options for treating jock itch, what actually causes it, and how to stop it from coming back.
What Is Jock Itch?
Jock itch, medically called tinea cruris, is a fungal infection that develops in warm and moist areas of the body such as the groin, inner thighs, and occasionally the buttocks [1]. It’s caused by the same group of fungi, called dermatophytes, responsible for athlete’s foot and ringworm elsewhere on the body [2].
However, jock itch isn’t actually caused by a worm, despite what “ringworm” suggests. That name comes from the ring-shaped rash the infection often leaves behind [2].
Interestingly, jock itch tends to be far more common in adolescent and adult males than in women or younger children, largely because of how much more this group sweats and wears occlusive athletic gear [1]. That said, it can still affect anyone.
Symptoms of Jock Itch
- A red, itchy rash with a raised, scaly border. It typically looks red on light skin and appears gray or brown on darker skin
- Often ring-shaped (1 to 2 inches wide), with clearer skin in the middle
- Usually starts in the groin crease and can spread to the inner thighs
- Skin may feel irritated, burning, or sore, especially if it’s rubbed raw [1]
What Causes Jock Itch?
Jock itch causes are almost always fungal, specifically dermatophytes that thrive in warm, moist, and enclosed areas of skin [1]. Your groin, with all its skin folds and trapped sweat, is basically a five-star hotel for these fungi.
Common Jock Itch Causes
Jock itch thrives in warm, moist environments. Here are some common ways the infection can develop or spread [2,3]:
- Excess sweating, especially from exercise or hot weather
- Tight or occlusive clothing that traps moisture against the skin
- Poor hygiene, like not drying off properly after a shower or workout
- Autoinfection from athlete’s foot, the same fungus can spread from your feet to your groin
- Sharing contaminated towels, clothing, or gym equipment
- Skin-to-skin contact with someone who already has the infection
Additionally, that last point matters more than people realize, ringworm-causing fungi spread through direct contact with an infected person, animal, or even a contaminated surface like a locker room bench.
Jock Itch: Who Is More At Risk?
Meanwhile, some people are simply more likely to develop jock itch than others. Risk factors include [1]:
- Being male, especially teens and adult men
- Playing contact sports or sweating heavily during exercise
- Having diabetes
- Having a weakened immune system
- Being overweight, since skin folds trap more moisture
- Living in a hot, humid climate
- Having athlete’s foot or a fungal nail infection already
That said, jock itch can affect anyone, it’s just more frequent in these groups.
What Can Worsen Jock Itch Symptoms?
In contrast to what a lot of people assume, treating jock itch yourself with the wrong product can actually backfire. Here’s what tends to make it worse [1,2]:
Steroid Creams
- Using a steroid cream on jock itch, even one meant for general itching, can let the fungus spread further
- Steroids can also change how the rash looks, making it harder for a doctor to diagnose later.
- They may still cause temporary relief from itching, which is exactly why people mistakenly reach for them
Other Aggravating Habits
- Continuing to wear tight, sweaty clothing without changing it
- Not treating athlete’s foot at the same time, letting the fungus keep reinfecting your groin
- Sharing towels or clothing while still infected
- Scratching the area repeatedly, which can lead to skin breakdown and a secondary bacterial infection [1].
Jock Itch Treatment Options: How Is It Treated?
Even better, options for treating jock itch are usually simple and don’t require a doctor’s visit for most people. Most cases clear up with over-the-counter antifungal creams, powders, or sprays containing ingredients like clotrimazole or terbinafine, applied once or twice daily for a few weeks [1].
Quick Tips For Effective Treatment
Before you pick a jock itch treatment option off the shelf, keep these basics in mind [1,3]:
- Apply antifungal medication exactly as directed, even after symptoms improve
- Keep treating for the full course, usually 1 to 4 weeks, to fully clear the infection
- Treat an athlete’s foot at the same time to avoid reinfecting your groin
- Avoid steroid creams entirely unless specifically told to use one by a doctor
- See a doctor if over-the-counter treatment doesn’t work, since oral antifungal medication may be needed for stubborn cases.
How To Prevent Jock Itch
Plus, once you’ve dealt with it once, you’ll want to avoid a repeat. A few simple habits go a long way [1,2]:
- Keep your groin area clean and completely dry, especially after sweating
- Change out of sweaty or wet clothes as soon as possible
- Wear loose-fitting, breathable underwear and clothing
- Bathe regularly and dry yourself thoroughly before getting dressed
- Don’t share towels, clothing, or personal items with others. If you still use shared items, it is advised to clean and dry them thoroughly before use.
- Wash workout clothes and towels in hot water after each use
- Treat athlete’s foot promptly if you have it, to stop it from spreading.
- Do not wear tight footwear. Go easy on your feet and wear breathable shoes or open-toed shoes.
- Avoid walking barefoot in public showers or locker rooms
When To See A Doctor: When Home Jock Itch Treatment Options Aren’t Enough
That said, most cases of jock itch don’t need a doctor’s visit, and home treatment works well for the vast majority of people. However, reach out for medical care if:
- The rash doesn’t improve after a couple of weeks of over-the-counter treatment
- The rash is spreading rapidly or covering a large area
- You notice pus, swelling, or increasing pain, which could mean a secondary bacterial infection
- You have diabetes or a weakened immune system and develop a rash
- The rash keeps coming back despite treatment
Stay One Step Ahead of Jock Itch
Jock itch is common, treatable, and honestly not something to stress over. Understanding common jock itch causes, like sweat, tight clothing, and fungal spread from athlete’s foot, makes it a lot easier to both treat it and stop it from returning. With the right jock itch treatment options and a few dry, breathable habits, most people clear it up within a few weeks.
FAQs
1. Is athlete’s foot the same infection that causes jock itch?
Yes, both are caused by the same group of fungi, called dermatophytes. In fact, the fungus can spread from your feet to your groin, which is why treating both at the same time matters.
2. Is jock itch the same thing as ringworm?
Yes, jock itch is technically ringworm of the groin. The medical term is tinea cruris, and it’s caused by the same dermatophyte fungi responsible for ringworm elsewhere on the body.
3. Can jock itch spread to other parts of my body?
Yes, it can, especially through scratching and then touching other areas. Autoinfection from your feet to your groin is common, so treating any athlete’s foot alongside jock itch helps prevent this.
4. Will I need an antibiotic if the blisters break open?
Possibly. If broken skin gets a secondary bacterial infection, antibiotics may be needed alongside antifungal treatment. It’s best to get it checked rather than guess.
5. Should I avoid sexual intercourse with a partner if I have jock itch?
It’s a reasonable precaution, since dermatophyte infections can spread through skin-to-skin contact, and some newer fungal strains have specifically been linked to intimate contact. Avoiding close skin contact until it clears is the safer choice.
6. Can jock itch go away on its own without treatment?
It’s unlikely to fully clear without antifungal treatment, and untreated infections can spread or worsen over time. Over-the-counter antifungal creams usually resolve it within a few weeks.
7. Why does my jock itch keep coming back?
Recurring jock itch is often linked to an untreated athlete’s foot, not finishing the full treatment course, or ongoing moisture and friction in the area. Addressing all three usually breaks the cycle.
8. Can women get jock itch too?
Yes, though it’s less common than in men. The same risk factors, like sweating, tight clothing, and fungal spread, apply regardless of gender.
References:
1. Pippin MM, Madden ML, Das M. Tinea Cruris. StatPearls. National Center for Biotechnology Information (NCBI), National Library of Medicine, National Institutes of Health. Available online at https://www.ncbi.nlm.nih.gov/books/NBK554602/
2. Ringworm Basics. Centers for Disease Control and Prevention (CDC). Available online at https://www.cdc.gov/ringworm/about/index.html
3. Treatment of Ringworm and Fungal Nail Infections. Centers for Disease Control and Prevention (CDC). Available online at https://www.cdc.gov/ringworm/treatment/index.html
4. Tinea Cruris, Jock Itch. Veterans Health Library, U.S. Department of Veterans Affairs. Available online at https://www.veteranshealthlibrary.va.gov/teststreatments/Skin/82,116104en
(The article is written by Nancy Dixit, Associate Manager, Clinical Health & Content, Medical Affairs, and reviewed by Monalisa Deka, Deputy Manager, Clinical Health & Content, Medical Affairs.)