I was helping a friend cut up cardboard the other day. It was pretty gelatinous and hard to cut through, but I kept at it. As I was cutting I feel something in my thumb... tingle? I'm not really sure. I didn't pay it any mind. But the next daylight the tip of my thumb was tingling. Now I can feel something moving kind of on the inside, and if I hit it newly right it tingles... a lot. Once it actually made me drop my pencil. I want to figure out what is going on and whether or not I obligation to see a doctor about it.
Answers:    If you did get a cut or bump to your finger or thumb it is fairly adjectives to have a tingling sensation in the tip of the finger/thumb afterwards. This is called "neuropraxia" and usually mechanism the nerve has been injured mildly and it recover in 99% of cases.

If you cut your thumb deeply, then you MIGHT own cut the nerve and should probably see a doctor about it.

I'm a little bit more concerned roughly speaking your sensation that something is moving about inside your thumb. Did you bruise it or do you think that some bit of metal has gotten inside your thumb? I'm sure you'd know if something stuck into your thumb because it would hurt a LOT at the time, and you'd probably bleed from where on earth it got in.

If you are unsure about it, maybe you could show an adult that you trust - maybe the school nurse / parent / other trustworthy fully fledged.

If it is quite bad, perhaps you should seize your family doctor to check it out.

If it is obviously very bleak (which I doubt, since you can still type), you should go to hospital.

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