Hi welcome to HCMForum. it appears to be fungal infection
. I advise you to consult a dermatologist
for diagnosis. If it is due to allergy
to pork it dont last for so long & cleared with hydrocortisone
. If it is bacterial infection pus or discharge will be there accompanied with pain.Besides i advise some diet restrictions. dont eat brinjal,& sea foods. I wish you an early recovery.