>>271607945
https://www.youtube.com/watch?v=0gbsWZce1B4

https://www.vive.com/us/support/vive/category_howto/wearing-the-headset-with-vive-deluxe-audio-strap.html

Follow this guide closely, it sounds like you're putting it on too tightly. Had a similar issue, just needed to wear it looser (and more pressure on my forehead / top of head)