Battery concerns.

So I've noticed that my HTC One (4.3) battery gets unbelievably hot anytime I use video call on Hangouts or Skype (which I do a lot). Just today I was using video call on Hangouts, I placed my phone on the table next to my bed with battery at about 90% & started a call & when the call ended about an hour later my battery was at 20% & the phone was literally too hot to pick up! Several battery apps said the battery temperature was around 48-52 degrees celsius. Is anyone else experiencing this with their One or using hangouts/Skype in general on their device?