Thanks for your query
Your problem seems to be that of frequent bruising of ski.
You should for sure see a physician or a dermatologist
for proper blood work up.
A detailed blood check up is required to rule out various important causes of the same.
Usually in young and middle aged people, it is not normal to develop recureent bruises.
However in people above 60, it is common to develop skin brusises with ant minor skin trauma
or even itching.
This is called senile purpura
It is a normal skin condition occuring due to thinning of the skin.
Hope it helps
Dr Geetika Paul