I did a quick googling on injury patterns.
Kids:
- Bruises that result from abuse tend to be larger; are more common on the face, back, abdomen, arms, buttocks, ears and hands -- and often occur in clusters
- Bruises on uncommonly injured body surfaces
- Blunt-instrument marks or burns
- Human hand marks or bite marks
- Multiple injuries at different stages of healing
- Circumferential immersion burns
- Unexplained retinal hemorrhages
- Children seldom bruise their buttocks in accidental falls.
- Bruises on the buttocks are in the primary target zone for nonaccidental injury.
Elderly:
- Sprains, dislocations, fractures, or broken bones
- Burns from cigarettes, appliances, or hot water
- Abrasions on arms, legs, or torso that resemble rope or strap marks
- Internal injuries evidenced by pain, difficulty with normal functioning of organs, and bleeding from body orifices
- Bilateral bruising to the arms (may indicate that the person has been shaken, grabbed, or restrained)
- Bilateral bruising of the inner thighs (may indicate sexual abuse)
- "Wrap around" bruises that encircle an older person's arms, legs, or torso (may indicate that the person has been physically restrained)
- Multicolored bruises (indicating that they were sustained over time)
- Injuries healing through "secondary intention" (indicating that they did not receive appropriate care)
- Signs of traumatic hair and tooth loss
Domestic violence:
- Chronic pain and /or areas of tenderness especially at the extremities
- Bruises, welts, edema or scars, particularly in the genital and anal areas and the breasts
- Swelling of eyes
- Split lip
- Ubconjunctival hemorrhage
- Signs of choking on throat
- Intra-abdominal injury
- Shoulder dislocation
Which is to say, sadly, there are a million ways to do it. I don't think (and that's why I started googling) that it's all about the face.