This week after working out with a client, I had the best case of delayed onset muscle soreness -- and I loved it :)
Delayed onset muscle soreness is the pain and stiffness felt in muscles several hours after exercise. It begins 8-24 hours after exercise, peaks 24-72 hours and goes away in 5-7 days. This is normal and THIS IS GOOD! The pain is part of a process that leads to greater stamina and strength as the muscles recover and build.
To rid the discomfort faster, perform a light aerobic workout, get a massage, stretch or take an anti-inflammatory. Or just wait it out - it'll go away within 5-7 days :)