This movie contains some intense, highly destructive action sequences, in which there are a huge amount of implied, mostly offscreen deaths and injuries. People fleeing for their lives are seen throughout the film. Nothing less or more than expected in a superhero movie.
An image is shown on Iron Man's phone of a man with his head crushed and with a message written on the wall behind him (in blood, implied). This is very brief and as it is only an image it's not very disturbing.
A character's arm is cut off by the main villain (We partially see the stump, but its not shown clearly. We do hear blood spilling, it is very audible, and adds to the disturbance).
Many HYDRA soldiers are shot by Iron Man, and are seen clinging to their legs (no blood, just pain).
A main character's torso is injured by a weapon. He is taken to a medical lab, where a futuristic machine regenerates his tissue (we see the bloody wound twice: once before medical attention, and once where the machine is regenerating tissue, as we see flesh regenerating).
Many robots are shot with an arrow (While this happens, electricity sparks).
A character is struck in the head with an arrow that gives an electrical shock to her brain (another character comes and saves her). Skin, skull are not pierced, no blood or gore.
Two main characters fight for a prolonged time. They both throw several punches and kicks at each other. At one point, one of them punches the other's tooth out.
A main character is shown being electrocuted on three different occasions.
A main character has a memory of a party where two German officials are fighting (Very brief).
A small innocent looking robot who is trying to make friends with a main character is smashed into pieces. It is a very violent and disturbing scene.