Got itching and burning pain in penis and itching in the fold areas in the groin have took every last std and all came back negative?

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.

Pruritus scroti: You probably have pruritus scroti. You could also have seborrheic dermatitis or a fungal infection. See your dermatologist