I've never had the problem with ear popping, but I have had many many low blod sugar reactions since starting Atkins (May 2003). Mine usually manifest themselves by a feeling of shakiness, lightheadeness, a feeling that I can only describe as if ants were crawling over my body (itchiness?), and, when it gets really low sweating so bad my body is covered in persperation. I have been having this problem worse now that I am re-inducting (trying to lose 10 more pounds to go below goal. I have found nothing works except eating carbs. I've tried eating protein but it doesn't help. Oh, well. just trying to get through. If you come up with something that works for you, please let me know.