Could Monopersulfate cause itching skin and bumps.

I had been using our hot tub for two weeks after filling it and balancing the ph, alkalinity and dichlor, calcium hardness etc to correct levels. I then added 1.5 oz of MPS and waited 2 days before entering spa. Within an hour after exit I had bumps and redness on my back which itched. After a few days the itching subsided but again returned after going back into spa for 10 minutes. This makes me suspect that I may be allergic to MPS.
I should mention that apart from adding the MPS this...

Could Monopersulfate cause itching skin and bumps.