Dark circles patches on knees after Q-switch & Pico laser - not worth it

I had a q-switch laser in combination with Pico laser on both knees to treat dark knees. I developed hives the next day and my knees was red. I have a very sensitive skin. 3rd day I got a red dark circles patches. And 1 week now I do have a really dark circles patches on my knees after the laser. I didn't go the sun and was always covered up. My knees became worst. The treatment was not worth it and a waste of money. But Is this the normal process? Is this a laser burn?