1
My son fell and was damaged.
My son fell and was injured.
Use damage for things or parts of the body, and hurt or injure for people: ‘The building was badly damaged by the fire.’ ‘He suffered brain damage.’ ‘He was injured in the crash.’ ‘She was hurt in the accident.’
2
The flooding caused a lot of damages to the roads.
The flooding caused a lot of damage to the roads.
When damage means ‘harm or injury’, it is uncountable. Do not use a/an or the plural form damages.