Hi and thanks for the query,
You should be allergic to the foreign material, which is the ear ring, which has certainly been infected by normal skin bacteria. Its important to clean around the infected area especially now. I suggest you sue some anti septics fluid like Povidone
to clean this ear area. Anti inflammatory drugs in case of pain or persistent inflammation might be required , like Ibuprofen
to control these symptoms. Ascertaining quantity of pus draining might also require prescription of an antibiotic. In case, it becomes really serious or persistent, consulting your primary care
physician could be very useful.
Thanks and best regards,