If you are having issues after surgery, especially with "psoriasis" you should contact your doctor. There is no generic oil that you can use. You need to find out what is going on before thinking about treatment options.
If you have issues after surgery, it is best to follow up with your doctor. Sometime they are referred to as "J" hairs. It may be a technical issue. There is no clear research on this.
The redness after the surgery at the donor side is common . If you feel pain or anything else than you should contact your surgeon for post op care instructions.