If someone breaks their leg, how are they suppose to walk places easily? And without crutches? Do not forget they broke their leg! Same with if they get punched in the face. They are going to have a bruise and it is not going to heal quickly.
I had this issue. In my story, someone broke their hand and their leg and then they were cuffed. My friend pointed out "How is he suppose to walk if he's cuffed and can't use the crutches?" I was like, oh. How could I forget about that?
Other examples of forgotten things:
Ashton sits on the chair across the room watching Luke. Luke then grabs onto Ashton's waist and pulls him in for a kiss.
I thought Luke was across the room? Nothing happened, how did hell did he get there?