<s>[INST] Hi. I got my braces off last week and got plastic retainers to wear at night. On the bottom right-hand side, my gums have ripped/torn or damaged tissue and small white bumps that are very painful which makes it hard to put the retainer in. It fit perfectly when I got them fitted. Is this normal? If so, what can I do to treat it? [/INST] Thanks for using Chat Doctor. Read your query. The damaged tissue could be due to the trauma caused by the retainer or any rough surface on the retainer. I would advise you to visit your orthodontist and get it evaluated and check for the fitting and smoothness of the retainer. Do antiseptic mouth wash gargling. Apply a topical anesthetic agent on the lesion twice daily till it heals. Hope this was helpful. Thanks and regards. </s>