Pooping alot.

All of a sudden my soon to 4 month old has started pooping 6-8x a day again. Not always Is it alot but the frequency is def different from her usual 2-3x per day. This has been Going on since the weekend. This had led to her first diaper rash. It's not too runny or anything. She is not fussy or anything else off. Should she go to Dr about the new pooping situation