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It seems the patient has developed Diabetic nephropathy.
Proteinuria indicated nephropathy in people suffering from diabetes and hypertension.
Swelling over the feet and testicles is due to proteinuria only.
I would advise you to get his following investigations:
1. Kidney Function test
2. 24-Hour urine protein or Urine Protein to Creatinine ratio
3. Ultrasound Abdomen.
A strict blood sugar control would be required. He would require diuretics for a few days to get rid of swelling over feet.
Further exact treatment decision is based on the reports.
I hope it helps.
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