random formation on hand?

I posted about this a few weeks ago but it developed more, and i have a picture of it now. Here's the original post:

I'm 15, 5'8 and weigh 156 pounds, live in the US (Illinois). A few weeks ago a random bump-like structure appeared on my left hand, near the bottom close to the wrist. I don't know how to describe it, and can't get a picture of it due to the fact it fills with blood the second i remove my hand wrap. It looks like a bump/scab, but it's more red and not quite clear, but not a solid color. It was bleeding a tiny bit when i first got and it stopped for a while. However, I poked it with a pencil (on accident) two days ago and it hasn't stopped bleeding yet. I have gone to school with a band aid on underneath a hand wrap wrapped tightly enough to apply pressure but still provide a bit of use to my left hand.

Like I said, whenever i remove the restraints it begins bleeding again. My parents think it may have been some type of small foreign object in my body due to playing lacrosse, so that may help describe it. Also, after it first started bleeding a thick layer of dead skin around it (maybe half a centimeter thick?) which i swiftly peeled, which in hindsight was probably an awful idea because this morning it bled worse. It's not gushing blood but it just wont stop. My mom thinks I might need a stitch if it doesnt stop, and I'm just asking to see what this might be.

Here's a picture

Now the same formation hasn't bled for a few days, but in about a half centimeter radius from the formation it has a slight purple hue to it. The inner scablike formation was scraped accidentally and a little bit of blood came out but i quickly stopped with a napkin and some pressure. The formation raises also about a half centimeter off the hand and has a flat appearance compared to the rest of my hand. My mom seems to think it isnt serious so we haven't gone to the doctor about it yet, but I think it's starting to look scary due to the purple color... what does askdocs think?