How to remove featured image from post only

Hello I would like to know how to remove the featured image from the actual post. Meaning i would still like for the featured image to appear on the main blog page, but on the actual post I would like to be able to have a different image than the featured image because the featured image is automatically stretched to the width of the blog post and it is very unsightly. I have looked through some old posts but those codes haven’t worked for me, and i am not sure which page those codes are supposed to go on for my theme anyway.

My theme is flatsome 1.8.7