Rashes on the sides of my groin?

Groin rash: These are most likely due to the moist conditions in this area with mild bacterial or fungal overgrowth and secondary itching. Less likely they may be a manifestation of std's . Your dermatologist or ob-gyn can sort this out. The area should be cleaned and kept as dry as possible. You may need topical anti-fungal or even steroid cream.

Intertrigo: Intertrigo (intertriginous dermatitis) is an inflammatory condition of skin folds, induced or aggravated by heat, moisture, maceration, friction, and lack of air circulation. Intertrigo frequently is worsened or colonized by infection, which most commonly is candidal but also may be bacterial, fungal, or viral. Intertrigo commonly affects the axilla, perineum, inframammary creases, abdominal folds.