Well you can definitely have more than one attunement. They don't have an expiration date BUT after two years of non-practice you might feel a bit out of touch with the energy. An alternative would be to find someone who can perform Reiju, which is like a "Reiki Booster" for after attunements.

My teacher has mentioned more than once that practice is important for keeping the channels wide open, and "if you don't use it, you lose it".  Obviously the energy itself and the ability to work with it do not go away, but it is possible to lose touch with the feelings, and you can always get a re-attunement to "flush the pipes."  Think of it as a stream that has become clogged with leaves and silt when the water is diverted elsewhere for a while...you have to run a lot of water through it to clear the stream bed and get it flowing smoothly again.  If you can't manage to get a re-attunement, a LOT of practice is an alternative.

I am more for the idea of Reiju.

Hello all! I have recently discovered that I can feel in my body where someone's pain is by touching them. I don't know if this can be used constructively but I am interested in the possibilities of Reiki...Can you go to a Reiki teacher or master and they be able to tell if you have the ability to learn how to direct this awareness or energy? It's as if I am trying to remember a dream and know its significant but can't...I want to be of help to others but don't know how or if this is a way to do it. Any thoughts would be helpful! Thank you, ~jules

P.S.- I read the article posted above regarding the study of astrological charts and reiki healers...it was fascinating however I don't know if my chart shows ability in this area. It was a bit over my novice head! LOL For those in Vedic astrology studies, my moon is in Dhanistha, whose ruling planet is Mars, in the 11th House, along with my moon (Purva Bhadrapada). Mars was listed as significant in the above article.