H2 leaking
 

https://cimg7.ibsrv.net/gimg/www.hum...a417fa746.jpeg
Found these stains under my truck. Does anybody know what it could be or if I should be concerned? Thanks.

Looks like coolant to me, cold weather makes seals and gaskets more susceptible to leaking. My guess would be a water pump gasket, and yes, you need to get it checked out.

it is marking its territory.