A picture would be very helpful. This is a classic area for psoriasis.
This does look like psoriasis with some of what we call lichenification, a thickening of the skin due to chronic rubbing.
what do I treat it with?
You would need something to thin the skin such as Carmol 20 and a steroid ointment , Maximum Strength Cortaid ointment would be the best OTC.. A tar preparation such as MG217 too. If these fail to work you would need prescription strength products. Sunlight will help. Dead Sea salts. Omega 3 Fatty Acids.
I am sorry is cortaid the only thing I need or do I put the Carmol 20 on it as well?
Put the Carmol 20 on at a different time.
These are OTC medications, but as I said, you may need prescription strength.