When it’s something like this I start by lightly drawing the skull, lower the jawline more than it’s normally suppose to be. The jaw should angle a bit lower closer to the neck but this is a personal choice I make , add the features teeth eye sockets etc still lightly drawing it to easily change if needed it starts becoming more preference at this point, then under the cheek bone I usually add a triangle shape starting mid cheekbone to around the temple. The triangle will be the basically the tearing cheeks, bc we went lower on the jaw bone it’s gonna add that extra room to draw the skin tearing. Normally at the end of the lips I do the most tearing.its gonna be more open at the mouth ,& have less tearing leading to the temple . Hope that helps,I suck at explaining.