My daughter had these issues when younger also at the same age . She complained a lot , something with lymph as I remember , she freaked out a bit , yet this disappeared . As years went on . Doctors said take some anti inflammatory . We never did a biopsy .yet they wanted to …… This can be a woman maturing . I have no idea . Keep an eye on her, now my daughter being the ripe age of 33 wants to have a child . Wellllll She has developed some type of thyroid issue over a year now , that needs to be addressed . She is on medication . I try to stay out of it , as she is married now … and she can take care of herself . I will come back to you what the diagnosis is exactly . I know with woman thyroid can regulate a lot of these issues , even though it is extremely possible one thing has nothing to do with the other in my daughters case .. yet I do wonder years later, and feel a bit guilty for not being more thorough 12 plus years ago with more examinations .. …… . .. get blood work and extensive . Just giving you my situation which may have nothing at all to do with your precious child . God Bless