Was damage dealt upped or damage taken upped?

I just played two games on poro king mode, my last games played were exactly a month ago and as soon as I logged on I began spectating a friend to wait for his game to end. I noticed that people were dying a lot faster than normal but kinda shrugged it off. Then we played 2 poro king modes and it became very clear to me that I was taking far more damage than normal, if I had to guess maybe 30%. I didn't see in the patch notes that damage was increased. Any ideas? All trolls welcome.. btw I've been playing LoL since the game released so I've spent some time taking damage.

Thanks