
The steroid creams should help, as long as you are applying it / them correctly.
As you have a red scrotum you have something that is causing a dermatological reaction - this often has a simple cause, such as changing to a different soap or shower gel, or even washing your clothes in something you have not previously used.
The skin can become further irritated because of issues like this if you are an active person, such as doing active sports, regular training, gym workouts, cycling or running.
The essential is thinking about what you skin is in contact with - such as soap, any form of body wash, clothing, sports shorts - that kind of thing. If you use ANY form of lube for masturbation or sex, for example. Often it may not simply be one thing, but a combination of what the genital skin is experiencing.
Try not applying soap or shower gel to your genital and groin region, fully rinse the area after washing everywhere else on the body, and make sure the skin of your genitals are completely dried afterwards - use a towel that ONLY you use
Check if you have recently changed what your clothing is washed in
If all this persists it would be best if you saw a Dermatologist