<s>[INST] I am a sexually active teenage girl, I am currently using the nuva ring as a contraceptive and I just ended my period yesterday. This morning when I tried to put the new ring in I noticed I couldn t get it in much farther than the opening and then about half an hour ago (just after sex) I tried to push it in farther where it is supposed to sit but I realized that there is swelling in what I m assuming is my cervix. It s feels like a large lump. What are some possible causes of this and should I be going to a doctor? [/INST] Hii , Welcome To HCM & Thanks For Asking Your Query Here however a vaginal lump is rarely caused by Nuvarings ,but Common side effects of Nuvaring are vaginal infections and irritation,which may lead to a a vaginal abscess more specifically it may be a Bartholin's Abscessit can occur when Bartholin’s glands, located on either side of the opening of the vagina, becomes infectedhowever a vaginal lump can be caused by many other medical conditions and as u did not mention any other symptoms like if there is any pain or discharge in lump , if you have fever or not , seriously it needs thorough medical check up and investigations to spot a confirm diagnosis i will strongly advise you to contact your Gynecologist, he will perform a physical examination to check for any lumps within the vagina your doctor may want to perform a biopsy on any masses found in the vagina to rule out other sources of the problemI hope it help Thanks & Get well Soon </s>