Yeah, bike shorts, that lube stuff you can rub on before rides.
But for me, I had it a lot when I was starting, then it finally died down. Now I never get it. Not even when im riding from when I wake up, to when I go to bed.
I think its worse for hairy guys, because the hairs actually twist, pull, and kinda get shaved off. But your 14, so im not sure how hairy you are. lol
Is it itchy when you aren’t riding? It could be a fungus known as tinea cruris - or jock itch which could be caused from the rubbing and sweating. Theres creams you could apply to get rid of it.
Its nothing to worry about, its pretty common. Just get Lamisil or a similar jock itch / athlete’s foot medicated cream at a drug store and it should be gone in a week or two. It will probably come back again after that but theres not much you can do other than make sure you shower or atleast change after a sweaty ride. Don’t go to bed after a hot ride without showering and the fungus will be less likely to grow.
Try “compression shorts”. They are similar to bike shorts but do not have the padding and are much cheaper. Look in the sporting goods department of your favorite Walmart, Target, etc.
Also be sure to change into dry clothes after you ride. Don’t wear wet/sweaty pants for a long time because that can lead to skin problems.
While you are looking for a pair of compression shorts, also consider looking for a pair of nylon basketball-type shorts. They don’t have a big seam in the crotch which makes them more comfortable to wear. Wearing something like bluejeans is very uncomfortable because the heavy fabric results in a big, thick seam in the crotch which you have to sit on.
You've managed to draw blood (I did when I first started, wrong pants.)
It's irritating even when you haven't been riding
then it could also be folliculitis. It's easiest identifiable symptom is pustules forming at the base of hairs. If it is that, you'll want it inspected by a doctor as soon as possible as it can spread, is contagious and can quickly lead to more serious infections.
It only takes a short course of prescription drugs to get shot of (some mild antibiotics) but you’ll want to get it seen to before it spreads.