Hi
It is difficult for us to advise you because we can’t make a diagnosis online, or suggest treatment for something that we haven’t seen. If we din’t have the right diagnosis, we would not be giving you the best health information.
I can say that based on the treatment the doctor gave you (Ketoderm) he likely suspected that the rash was fungal, also known as yeast. It can take a while to go away.
On the other hand, maybe there is something else going on and another treatment would be better for you.
If you have used the treatment correctly and the problem is still there, then it is a good idea to go back and ask him to look at it again.
Please leave a comment to let us know if that answers your question or if you need more information.
Health Nurse
For other readers, please feel free to leave a comment, or let us know if this was helpful.