suddenly my left leg is twice the size of my right leg i'm diabetic and have slept on my left side for appx 5 years
good for you for noticing this. it's important for people with chronic conditions like diabetes to stay on top of any physical changes in their body. i suggest you call your primary care provider for an appointment. the kind of swelling you describe sounds like fluid retention or ' edema. ' this can be a sign of an underlying medical condition (possibly related to your diabetes or something else entirely). mild one-sided edema of the lower leg isn't necessarily cause for alarm in an otherwise healthy person. but it would be best to get it checked out. wishing you well!