Welcome to HCM. I have gone through your question and understand your concerns.
Do you have a swelling in neck?Thyroid
can cause this problem in two condition - 1. an enlarged thyroid pressing on carotid arteries 2. Over functioning thyroid causing increased carotid pulsations.
Please check with your doctor to find out the cause.
Hope I have answered your query. If you have any further questions I will be happy to help
With warm regards,
Dr Ajish TP (MD,DM)