First, if the swelling is to one side of the throat and if it hurts, that's the lymph nodes of the neck. If a person gets an infection, say, in the gums, it will drain down into the lymphs, and they will swell up and hurt. A cold or nose infection will do the same thing. It will subside on its own.
Acid reflux is within the throat and thus normally will not affect the thyroid gland, which is situated outside the throat. Reflux will sometimes cause erosion of the tissues inside the throat, but not a lump near the outside of the throat.
If I understood your post correctly, if you do have nodules on your thyroid, and now you have this a rather larger lump near there, then you must visit an endocrinologist so he can check out your thyroid gland and see if the lump is somehow connected to it, like if one of the nodules has gotten too large. Your physician can refer you to the specialist for that.
Copyright 1994-2018MedHelp.All rights reserved. MedHelp is a division of Vitals Consumer Services, LLC.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. MedHelp is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.