Intertrigohttps://en.wikipedia.org/wiki/Intertrigo
Intertrigo refers to a type of inflammatory rash of the superficial skin that occurs within a person's body fold areas. Areas of the body which are more likely to be affected by intertrigo include the inframammary fold, intergluteal cleft, armpits, and spaces between the fingers or toes. Moisture, friction, and exposure to bodily secretions such as sweat, urine, or feces promote skin breakdown.

The term " intertrigo " commonly refers to a secondary infection with bacteria (such as Corynebacterium minutissimum), fungi (such as Candida albicans), or viruses. The most common cause is Candida infection.

Intertrigo occurs more often in warm and humid conditions. Generally, intertrigo is more common in people with a weakened immune system including children, the elderly, and immunocompromised people. Intertrigo is also more common in people who experience urinary incontinence and decreased ability to move.

○ Treatment ― OTC Drugs
* OTC antifungal drug
Because Candida albicans is the most common cause, the antifungal agent is prescribed in most cases.
#Ketoconazole
#Clotrimazole
#Miconazole
#Terbinafine
#Butenafine [Lotrimin]
#Tolnaftate

* OTC steroid
OTC steroids can be used together to reduce allergies or irritant inflammation.
#Hydrocortisone lotion
  • Axillary Intertrigo
  • Arm pit Intertrigo
References The diagnosis, management and prevention of intertrigo in adults: a review 37405940
Intertrigo is a frequent skin disease triggered by rubbing between skin folds, typically due to trapped moisture from limited air flow. It can happen wherever skin surfaces touch closely.
 Intertrigo and Common Secondary Skin Infections 16156342
Intertrigo is the disease when skin folds become inflamed due to rubbing against each other. It's a common issue that affects areas where skin touches skin or mucous membranes. In kids, it can show up as diaper rash. It happens in natural skin folds and also in folds created by obesity. Friction in these areas can lead to complications like bacterial or fungal infections. The usual way to manage intertrigo is to reduce moisture and friction using powders like cornstarch or barrier creams. Patients should wear loose, breathable clothes and avoid materials like wool or synthetics. Doctors should advise patients on avoiding heat, humidity, and outdoor activities. Exercise is usually good, but patients should shower afterward and thoroughly dry affected areas. For intertrigo between the toes, wearing open-toed shoes can help. Bacterial or fungal infections should be treated with antiseptics, antibiotics, or antifungals, depending on the cause.
 Intertrigo 30285384 
NIH
Intertrigo is a superficial inflammatory skin condition of the skin's flexural surfaces, prompted or irritated by warm temperatures, friction, moisture, maceration, and poor ventilation. Intertrigo's Latin translation, inter (between), and terere (to rub) helps explain the physiology of the condition. Intertrigo commonly becomes secondarily infected, notably with Candida; however, other viral or bacterial etiologies may play a factor in its pathogenesis. Intertrigo can be seen in all ages and is primarily a clinical diagnosis, with the frequently affected areas being the axilla, inframammary creases, abdominal folds, and perineum. Characteristically, the lesions are erythematous patches of various intensity with secondary lesions appearing as the condition progresses or is manipulated.