<s>[INST] Dear Doctor, I have a strange buzzing feeling in my chest... like there s a cell phone inside my chest buzzing. I ve looked into this online and it seems to be quite common. Or at least I see a lot of people asking about what this is. I m not in any pain. I do have Hashimoto Thyroid. Can you tell me what this might be? [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Vibrations in the chest are commonly seen in arrhythmia and palpitation. And both are common in thyroid diseases. Since you are having Hashimoto s thyroiditis, possibility of thyroid hormone imbalance as a cause for your Vibrations is more. So first get done thyroid function test. If this is normal than get done ECG, 2d echo and Holder monitoring (24 hour continuous monitoring of ECG) to rule out arrhythmia. If all these are normal than no need to worry about heart and thyroid problems. Sometimes, stress and anxiety can cause similar symptoms. So avoid stress and tension, be relaxed and calm. Consult psychiatrist and discuss all these. You may need anxiolytic Chat Doctor.  Don't worry, you will be alright, but first rule out thyroid and heart related diseases. Hope I have solved your query. Wish you good health. Thanks. </s>