Please diagnose from the following symtoms : ankle swelling, red rash at ankles and on lower leg, spots on feet / leg / fingers

I recently flew to and from the USA and did a lot of walking when I was there. Also, I have to admit to late nights and excessive eating / drinking !

My legs swelled quite markedly whilst I was there and have only improved a little one day after my return. The rash began to develop towards the end of the trip and has not got considerably worse