BIG QUESTION

can people be allergic to grass? Every time i go in the grass or outside with my friends i’d wake up the next morning with red bumps on my legs different places every time, kinda like razor burn but different in some ways. At first i did think it was razor burn but then today i came home from my friends and we had been outside to go to the store and stuff and a few hours later i realized the bumps were there again! I did some thinking and i realized they only occur occasionally after a few hours of being outside with shorts on. Does anyone have extra info on what it might be?

if people need i can post a picture i just wanna figure out what it is because i don’t exactly have a toned body and this makes me even more insecure😕