Thank you for the information,
There are some common causes of led edema which is pitting.The common ones are venous stasis, hypoproteinemia, lymphedema, electrolyte imbalance, etc.
As per the symptoms,there are chances that you are having such leg edema due to microvascular obstruction.The diabetes can commonly cause such symptoms over some years.
The other possibility can be the side effect of the drug lotensin which can cause peripheral angioedema.You may ask your doctor to change the drug to some other antihypertensive.
You should also have the relevant investigations done like blood urea, creatinine, liver function test, venous doppler, serum electrolytes to rule out other causes after consulting your doctor.
The treatment depends on the underlying cause.
Please visit here:
side effects of lotensin
Let me know if you have any doubt.