Red itchy spot on testicle after a few days of spraying meds nearby

[Pneew]

27yo male here, 180cm, 88kg, Europe, no medical issues or medicines.

I've had a strain injury from running resulting in a painful spot around 1cm above my penis and 1cm to the left when walking/running so - as with all my running injuries - I waited a few days and then, as it didn't help, I went with spraying an indometacinum spray I once got from an ortho in that spot. Since it is close to sensitive areas, I always covered my penis and scrotum when doing it but as it is with sprays, it always dripped a bit (though I always wiped the excess with my hand). After a few days of spraying, my injury started going away but the border between the underbelly and the top of my left testicle sack was stinging after each application (the stinging subsided within a few minutes every time though). So I kept spraying (though more rarely) for two more days until the injury was gone and then stopped.

Now, I am a few days off my spray but the area the spray was dripping to is red, tense in texture and itchy as hell - imgur.com/a/sTvezYT is what it looks like (NSFW obviously). When it gets a little warm down there (like during workout or after walking for some time), it starts being really, really itchy. It also has the itchiness episodes throughout the day with no apparent trigger and sometimes it gets itchy enough that it literally wakes me up at night and I need to uncover to let it cool down a bit as it seems to help.

I've tried cortisone cream, sudocrem and baby powder for this and basically I'm rotating between these three. None helps for long though - it's usually 2 or 3 hours before it becomes itchy again and I need to apply the next thing to soothe it a bit.

Is it a good plan? Should I just keep doing this and wait it out? Or should I start applying something else to facilitate the healing?