Dandruff and Itchiness in recipient area. Can I use oil on the recipient area or anti-dandruff shampoo?

transplant done 18 days ago & for the past couple of days I have been noticing dandruff and dry scalp in the recipient area & it's causing frequent itchiness as well. Doctor in the post op instruction had advised not to use any gels or oils for first 6 months. currently using the shampoo provided by doctor. wondering if: 1. I am ok to use some kind of Oil on the recipient area or would it impact the growth. 2. Also concerned about using anti-dandruff shampoo as chemicals may impact the growth.