Hi Dan! Welcome to DermaTalk . Sorry to know about your father condition. With age the circulation of our lower legs seems to deteriorate causing venous hypertension due to venous insufficiency. This results in condition called stasis eczema which your is suffering from.
Avoiding prolonged standing and elevation of legs during sleeping and sitting may help reduce the edema and improve the circulations. Wearing Compression stocking especially during out from bed in the morning may be helpful. Similarly applying topical corticosteroids, oral antibiotics and antihistamines may help to alleviate the lesions. In case of surgically correctable venous insuffiency is detected a surgeon may also be consulted. Thus it is suggested to consult a dermatologist and treat it accordingly.
Hope you keep us updated about your father condition,we will be happy to hear from you.