My left one to be precise.
The lowest bit of it has been rather swollen for quite a few years but hasn't hurt. Two weeks ago it swelled up much more than usual so I arranged a doc appointment. That led to a blood test and me sleeping with my leg more elevated than usual. I have noticed a rather sore varicose vein near my ankle.
Within the past two or three days I have noticed a different-from-normal swelling just below my calf muscle. Last night, after a shower, I realised it had swollen some more to the extent that I was inclined to dial 111 for advice. This is in conjunction with the family history of left legs: my brother has twice had DVTs in his, and my sister has had thrombophlebitis in hers (I am impressed that "thrombophlebitis" is a Known Word in two different spell checkers that I have used).
My 111 call resulted in a 4.45 am appointment today in the GP unit in Southend Hospital. The doctor I saw said she thought it wasn't DVT but was cellulitis. It is a bit painful. I have a course of antibiotics - fluoxocillin, 28*500mg capsules to consume over 7 days.