21M With Weird mass under skin and it’s malleable, should I

Need an explanation on this weird sound that I caught while recording

Weird bump on back of head. Had it as long as I can remember

Weird hiccups? They feel like hiccups but definitely don’t

My left shoulder’s really weird. No pain, but causes muscular

Rare sound in my head/nose/throat

weird pulsing in my foot?

weird rumbling sound in back whenever i deeply breathe in?

why does my knee sound so weird when i stretch it?

Lungs sound weird

Weird flaky brown patches?

Sound on: Shoulder makes weird noise idk :(