There are losts of reasons for low platelets, ranging from autoimmune attack to congenital problems of platelet production to medication reaction.

But, a level of 127 is not that low--most hematologists won't be too concerned until the level drops out of three figures.

The important thing is--is this a new, and totally out-of-character result for you, or have your platelet results in the past always been in the low to low normal range? If this is a new result, what has changed, lifestyle wise or symptomatically? What do other tests show?

My wife has congenitally low platelets, with associated giant platelets--which often contributes to a low overall count. She's always in the 110-130 range, and has been since I've known her (a good 28 years). There've been numerous invetigations carried out, to no particular result, so we've sort of gotten around to the idea this is just her. She does bruise easily, but does not bleed spontaneously, so we are just watchful.

In her case, if her platelets suddenly shot up in number, I'd be more worried.