I have had badly swollen legs and feet from the knee joint down for a month?

I have had badly swollen legs and feet from the knee joint down for a month or so now . I had bloods taken , and xray on my heart to see it was not enlarged as I am on Blood Pressure medication, both showed up nothing at all. I then went for a ct scan but due to the foot swelling they only managed to get the fluid into one leg and the result showed up inconclusive !!! I have been taking water tablets since that more thab 2 weeks ago. The swelling has gone down a lot and you can see the veins in the feet clearly. Some areas of the leg a like spungy and you can press the skin in and it comes back out in a short while. Although never had any pain I have tingly feelings in the legs . I am UK resident but working in Okpo S.Korea. I have stayed in Indonesia for the last 9 years.

Age: 61
Male
Medications: Blood pressure tablets. 1 adalat twice daily, 1 Norvasc daily and 1 Intrak daily. I also take 1 omeprazole daily for reflux ( for the last 15 years)