I didnt shower after hockey last night, and now i have little bumps all over my arm?

Ok, last night i had hockey practice and i was sweating so much on the ice, so i got home after practice smelling like crap and it was late so i didnt take a shower, and this morning i noticed that i had all these little bumps all over my right arm. they are really small they kind of look like goose bumps but more spaced out and there is alot of them. can some one please help me! and yes i took a shower this morning.