Dear Annie,
My guess as to why you're attracting mosquitoes? Reiki adds hemoglobin to the blood, in other words, the oxygen supply in it is increased. So in other words, I think probably you have healthier, tastier blood.
Citronella essential oil is supposed to ward off mosquitoes. There are also natural remedies for bug bites. I'd check your local natural store.
Rock On
Roxy