I Don t know if I am contacting an Orthodontist, but here s the question
Thanks for your query, I have gone through your query. The discomfort over the tongue secondary to the retainers could be because of the rough surfaces or sharp edges over the retainers. Consult an orthodontist and get the rough surfaces smoothened or covered witChatDoctorposite. If you are not at all comfortable with fixed retainer then go for removable retainers. I hope my answer will help you, take care.