Hypertension,edema,skin Rash,hydrochlorothiazide,amlodipine
Your question is a good one and I will try to give you some good information and recommendations regarding what is going on.
First - regarding the edema of the legs. This can be a big problem and can be a source of skin breakdown and infections if it is chronic. I have to say that the amlodipine is notorious for causing edema of the legs and I wonder if this is the case for him. I would discuss this with his doctor to see if an alternative may be appropriate.
Now with regards to the fungus - we need to make sure his immune system is functioning normally, so a CBC blood test may help verify that. Beyond that, it may be necessary to take both an oral medication as well as use a topical cream to treat this. Some fungal infections can be quite resistant and uncomfortable as I am sure you are aware.
Lastly I think a visit to the dermatologist is in order. An expert opinion by a dermatologist may prove quite helpful in providing a solution to this issue.
I thank you again for submitting your query and hope my response has proven to be helpful and informative. If you have any additional questions I would be happy to address them.
Sincerely,
Dr Galamaga