recently i had swollen ankles my doctor called it peripheral edema. the swelling has gone down but i still have tingling in my toes . i followed all doctors advice to raised feet and legs to lower salt in diet. i was taking Viagra once daily also i was on my feet for many hours right before the swelling began. as soon as i noticed the swelling i followed doc orders and swelling went down . why do i now have tingling in my toes and will that diminish in time ? is Viagra a common cause for edema?