You could have been bitten by a horse-fly (also called Cleggs). They give you a nasty bite which often leads to cellulitis. One made a right mess of my husband's leg last year. He's got varicose veins in one leg and it went for that because the blood supply is much nearer the surface. That was last summer. In February this year the site where the worst bite was flared up and came out in a blister. We thought it was going to turn into a leg ulcer but we put witch hazel gel on it and it finally healed up after about a week.

Nasty things Cleggs and you don't normally know it's bitten you and had a meal from you until later as their saliva anaesthetises the area they bite. Once they've had their fill of your blood they fly off and when the area "thaws" out again it is very painful.

We had a lot of them last year but as we had a fairly cold and wet summer this year there haven't been so many of them (thankfully).