Hi and welcome.
Can you please try to attach/upload the image again? The image has not been attached with the thread.
Got them, let me have a look and I'll get right back to you.
Alright, I have seen the images. This looks more like a fungal rash rather than bacterial or folliculitis. Intertrigo is a more appropriate diagnosis. Intertrigo is a fungal infection caused by friction, sweat and heat in areas of body folds like the groin and the atmosphere in these areas which is moist, warm and easily ignored is the kind of environment, fungi dwell in.
An application of an antifungal ointment or powder like Lamisil powder twice a day for a week along with good hygiene and keeping the area dry will be effective.
However, I would like that you discuss this with your Doctor again.
Let me know if you have further questions.
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Wish you good health.
You can try it. Tolnaftate has indications in jock itch.