Present as sores or painful blisters and usually develop a few
days after contact with an infected partner. they may itch or make it
difficult to urinate.

Sounds like your describing the STD herpes. Which will cause the sores and is transmitted through intercourse and touch.

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle