Injury advice thread

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>just started working out
>get an injury
>blisters on my feet
>can't do squats
>every step is agony

Can we have an injury advice thread where anons tell other anons ACTUAL DIY remedies for certain injuries, like what you should buy or how to treat a specific kind of pain?

I'm currently soaking one of my feet in a small tub of hot (now warm) water with concentrated iodized salt mixed in
When the water goes cold I'll pop it with a large pin, apply light pressure to coax the fluid out, then place antibacterial band-aid over it with some gauze and paper tape to seal the wound
I might change it tomorrow morning and repeat until it goes away.

Got any injury tips/advice anons?