One of my daughters and I get this anytime we use spray suntan lotion, and sometimes regular suntan lotion (like from Coppertone or Banana Boat). It's exactly what you explained - light pink/reddish bumps that itch. And they show up everywhere that the lotion is put on. I've had to switch us all over to the physical blocker type of sunscreen. That's the kind with zinc rather than chemicals. For me, the rash fades in two - three days; hope yours does too!