Your back looks like a giant octopus gave you Hickeys. And you need to go it often enough to see the results which most of you never go back to repeat cause one time was enough to give you all PTSD.
A lot of times, your colour of bruises is more dark purple and it indicates too much bad energy inside you. Practice better lifestyle diet and exercise choices and going often will make the bruises lighter in colour. That is the folklore behind cupping or fire cupping. I have done a few in my life and do not like it for a week. The masseuse does not need to work as hard to massage you, unlike manual manipulation of your muscles by hand or by walking on your back methods.