what is this gross bump on my knuckle?

first off i’m so sorry this is so gross. i hate looking at it cause it ignites my trypophobia and makes me want to vomit. so i’m so sorry.

but i really need help, i dont know when it appeared but it’s been at minimum 2–3 months? maybe? and it’s red cause i was picking at it with tweezers so it started bleeding when i pulled the little pieces? or whatever. and it would hurt when i was picking at it as well, and i was picking at it yesterday night and then when i looked at it today a whole day later i swear it looks like it grew a little taller/bigger? so should i be worried? does anyone know what it could be? and how i could of gotten it? and how to get rid of it?

any help will be great, thanks!

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