I can see my heartbeat when standing. Is this cause for concern?

This is on the bottom edge of my left hand. Is it anything to

My legs constantly twitch/spasm. Does anyone know why this is

Swollen lymph nodes

Why collarbone do this?

Bump on shin

Hello I have a hard but squishy bump behind my ear, is this cause

Gf has this strange eye twitching.. is it cause for concern?

Concern: Rabies

toenail concern

Right knee on it's last life, sounds like this whenever extended,

Is this a cause for concern?