Itchy Scrotum: Causes and Treatment

Why the scrotum itches so easily

The scrotal skin is thin, has many sweat glands and nerve endings, and sits in a warm, enclosed, moist fold. Sweat breaks down the skin barrier, clothing rubs it, and fungus and yeast thrive in the heat. Once you start scratching, the skin becomes inflamed and itchier, so a mild problem can turn into a stubborn itch-scratch cycle.

Common causes of an itchy scrotum

Jock itch (tinea cruris)

Jock itch is a fungal skin infection caused by the same fungi as athlete's foot. It is the most common cause of a groin itch in men who exercise, sweat a lot or are overweight.

Typical clues:

• a red or brown, itchy rash in the groin crease and inner thighs
• a raised, scaly, sharply defined edge that spreads outward while the middle clears
• often spares the scrotum itself, or affects it only mildly
• often comes with athlete's foot, because fungus spreads from the feet on your hands or towel

Sweat, heat and friction

Moist itching of the scrotum, especially in hot weather, during long periods of sitting or after exercise, is often simple irritation. The skin may look normal or slightly pink. Tight synthetic underwear, cycling, long drives and being overweight make it worse. A hot, itchy scrotum that settles after a shower and loose clothing points to this.

Irritant or allergic contact dermatitis

Contact dermatitis is eczema caused by something touching the skin. The scrotum reacts easily to:

• scented soaps, shower gels and bubble bath
• laundry detergent and fabric softener residue
• condoms with spermicide, lubricants, latex
• shaving creams, depilatory creams and hair-removal wax
• antiseptics, topical medicines and "intimate" wipes

The skin turns red, dry and itchy, sometimes with swelling or tiny blisters. Allergic reactions often appear 1 to 3 days after exposure, which makes the trigger hard to spot.

Yeast infection (Candida)

Candidiasis causes a bright red, moist, raw-looking rash with small red spots (satellite lesions) beyond the main edge. Unlike jock itch, yeast commonly affects the scrotum itself. It is more likely with diabetes, after antibiotics, in uncircumcised men and when a sexual partner has a vaginal yeast infection.

Dry skin and eczema

Atopic eczema and dry skin can affect the scrotum, especially in winter or with frequent hot showers. The skin looks dull, flaky and fine-lined rather than inflamed.

Itchy scrotum with no rash

An itch with normal-looking skin is common and usually comes from:

• Early irritation or eczema before a visible rash appears
• Dry skin from hot water and soap
• Lichen simplex chronicus: a habit itch. Repeated scratching thickens the nerve endings and skin, so it itches more. It is often worse at night and with stress. Over months the skin becomes leathery and darker. See lichen simplex chronicus.
• Nerve-related itch: irritation of nerves from the lower spine can cause itching without a rash. This is uncommon.
• Whole-body itch: kidney or liver disease, iron deficiency, thyroid problems and diabetes can cause itching anywhere, including the groin.

Infestations and infections to rule out

Scabies

Scabies is caused by tiny mites burrowing in the skin. It causes intense itching that is much worse at night. On the scrotum and penis it often forms firm, very itchy red bumps (nodules). Look for itching between the fingers, on the wrists and around the waist too, and in people you live with or sleep with. It needs prescription treatment for you and all close contacts at the same time.

Pubic lice ("crabs")

Lice that live in pubic hair cause itching in the groin, worse at night. You may see tiny gray-brown lice or white eggs (nits) stuck to the hairs, and small blue-gray spots on the skin. They spread through close body contact, usually sex. Over-the-counter lice lotions treat them. Sexual partners need treatment, and a sexual health check is advisable.

Sexually transmitted infections

Genital herpes often starts with itching or tingling before painful blisters appear. Trichomoniasis and other infections can cause itching with discharge. If you have new sores, discharge or a new partner, get tested.

Skin conditions that affect the scrotum

When to see a doctor for an itchy scrotum

Book an appointment if the itch lasts more than 2 weeks despite self-care, keeps returning, spreads, or you notice sores, bumps, lumps, discharge or itching in partners. Seek urgent care for a hot, painful, swollen scrotum with fever. Any new lump in a testicle needs to be checked within a couple of weeks, even if it does not hurt.

What the doctor will do

Your doctor will ask when the itch started, whether it is worse at night, what soaps and products you use, about exercise and sweating, sexual contacts, and whether others in your home itch. They will examine the groin, feet, hands and other skin. Tests are often not needed, but they may:

• scrape scales from the edge of the rash to look for fungus under a microscope
• swab moist rashes for yeast or bacteria
• look for scabies mites or burrows
• test for sexually transmitted infections
• check blood sugar, especially with yeast infections
• take a small skin sample (biopsy) for a rash that does not respond to treatment

Itchy scrotum treatment

Home care for scrotal itching

• Keep the area dry: dry the groin thoroughly after showering, using a separate towel from your feet. Change out of sweaty clothes promptly.
• Wear loose cotton underwear: boxers rather than tight synthetic briefs. Change them daily.
• Wash gently: use plain water or a fragrance-free soap substitute. Avoid scrubbing, antiseptics and wipes.
• Moisturize dry skin: a bland, fragrance-free emollient once or twice a day, but not into moist, raw folds.
• Cool compresses: a cool damp cloth for 10 minutes eases an intense itch.
• Stop scratching: keep nails short. At night, cotton gloves can help break the habit.
• Rinse laundry well: switch to a fragrance-free detergent and skip fabric softener.

Over-the-counter treatment

• Antifungal cream (clotrimazole, miconazole or terbinafine): for jock itch or yeast. Apply twice a day to the rash and a little beyond its edge. Continue for 1 to 2 weeks after the skin looks clear, or the fungus returns. Treat athlete's foot at the same time.
• Hydrocortisone 1% cream: can ease eczema or irritation for a few days. Do not use it alone on a fungal rash, because steroids can make fungus spread. Do not use any steroid on the genitals for longer than about a week without medical advice.
• Antihistamine tablets at night: a sedating one may help you sleep through the itch, though it does not treat the cause.
• Lice lotion: permethrin or other pediculicides, following the label instructions, with a repeat treatment if the label advises.

Prescription treatment

Doctors may prescribe stronger antifungals or tablets for widespread fungal infection, permethrin cream or tablets for scabies, short courses of steroid or non-steroid anti-inflammatory creams for eczema, psoriasis or lichen simplex, and specific treatment for any sexually transmitted infection.

Preventing an itchy scrotum

• Shower and change after exercise, and keep sports kit washed.
• Put socks on before underwear if you have athlete's foot, so fungus is not carried up.
• Use an antifungal powder in the groin if you are prone to jock itch.
• Avoid perfumed products on the genitals.
• Manage diabetes and keep to a healthy weight to reduce yeast infections.
• Do not share towels.

Frequently asked questions

What causes an itchy scrotum?

The most common causes are jock itch (a fungal infection), sweat and friction, and contact dermatitis from soaps, detergents or condoms. Yeast infection, dry skin and eczema are also common. Less often, scabies, pubic lice, psoriasis or a sexually transmitted infection is responsible.

Why is my scrotum itchy but there is no rash?

Early irritation, dry skin, sweat and the habit itch of lichen simplex can all cause itching before any rash is visible. Scabies can also start this way. If the itch lasts more than 2 weeks, is worse at night, or others in your home itch, see a doctor.

What is the best itchy scrotum treatment at home?

Keep the area cool and dry, wear loose cotton underwear, wash with plain water and avoid perfumed products. If there is a red rash with a raised edge, use an over-the-counter antifungal cream twice a day for 2 to 4 weeks. Short-term hydrocortisone can help eczema.

Why is my scrotum itchy at night?

Itching often feels worse at night because there are fewer distractions and the skin is warm under bedding. Intense itching specifically at night, especially with small bumps or itchy partners, is typical of scabies or pubic lice, which need specific treatment.

Can an STD cause an itchy scrotum?

Yes, though it is not the most common cause. Genital herpes often starts with itching or tingling before blisters appear. Pubic lice and scabies spread through close contact and cause itching. Get tested if you have sores, discharge or a new sexual partner.

Should I use hydrocortisone on an itchy scrotum?

Only briefly and only if the cause is irritation or eczema. Steroids can make a fungal infection spread and can thin genital skin with prolonged use. If you are unsure whether the rash is fungal, use an antifungal first or ask a pharmacist or doctor.