What R the signs of a Bee sting on a dogs corner of the mouth?

What are the signs of a bee sting on a dogs mouth? His mouth does not seem to bother him he is eating/drinking etc he was fine but when I let him out in the morning the corner of his lip looked a little pink & swolen he is a GSD so as you all know they have hard mouth so you usually do not see the lips
it looks like it has a scab on it but trying to hold him still to have a look is a nightmare he gets really excited.

He is not keen on going vets as they hurt him last time & he has never forgotten. I cant muzzle him cause it is the part they need to see.

Any ideas?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).