Intertrigo describes a rash in the body folds, such as in the folds of the neck, under the arms, under a protruding abdomen, in the groin, underneath the breasts, or between the buttocks. Intertrigo usually presents as red, itchy, burning patches and papules, and occurs in these skin folds.
It can occur in people of all ages and sexes, but is more common in those that are overweight or obese. Genetics play a role, but environmental factors are the main contributing factors for intertrigo. These skin folds have a relatively higher surface temperature than other areas of the body. Moisture from sweating cannot evaporate due to occlusion. There is also a lack of air circulation in these skin folds. Friction from movement of adjacent skin results in inflammation.
Intertrigo is typically infectious in nature, with the common culprits being yeast, fungi, and bacteria. Treatment involves topical agents against the offending culprit. Sometimes, mild corticosteroids are also used to help with inflammation. In severe cases, oral agents may be used.
Common non-infectious causes for intertrigo include psoriasis, atopic dermatitis, and irritant dermatitis. Treatments for these include topical corticosteroids and emollients.
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