I did get a nose bleed once off of a fifty-one cart .It was my first all day vaping and the nic rate at least for those carts was listed as higher than I would use with my 510.Have not had any more but only been out like 6 times vaping so it does worry me a little.It would be very ugly to be out with a bloody nose so I am hoping it was just that cart or me being a rookie and smoking the cart dry while out.The fifty-one carts are listed as all pg , any thoughts on how to avoid this in the future?