Welcome to healthcare magic forum
Thank you for your query.
I understand your concern regarding your skin problem
I am dr Gaurav patel ,dermatologist
and will answer your query.
You have aged skin ,which is very thin and sensitive .
Your problem is known as senile purpura
and is very common in your age group
It is more common if you are taking any blood thinning drug
you can apply good moisturizer over skin .
wear full cloths and avoid any trauma to your skin will help you.
I hope I answered your question.
Let me know if you have any further query.