Short Sightedness, which my younger brother (but not my older brother), mum, dad, aunt (on mother's side) and mother's parent's all have/had.
Other than that, just very slight eczema, which both my brothers have to worse degrees.
My mother also has Rheumatoid Arthritis, and so did her grandmother.
There's no exact knowledge of how people gain RA, but there is believed to be some slight genetic trait to it.
It more commonly affects women, but men can also have it.
And contrary to popular belief, it's possible for the young to get it too, even infants. Most people assume it's like osteoarthritis, which is wearing of the bones, which is more common in the elderly following long lives spent working. But Rheumatoid Arthritis is an autoimmune disease and doesn't necesarilly show any physical symptons.
While I don't have it currently, there's a possible chance that I may develop it later on in life, or a sibling might, or a child (trend so far is it skipping generations, but that's no guarantee).
