Hello Sir, I am Riaz, I want some advice on sexual...

Treatment of sexual issues:

It depends on the cause of problem, patient age, and general health of the patient, so treatment may be by conservative management as doing regular exercise, good nutrition, drinking good amount of fluid daily, avoidind stress, and you have to control diseases as dibetes, hypertension.
If there is no response you can take sildenafil or cialis to improve sexual function.

Diagnosis of the cause of sexual issues:

You have to visit your doctor for clinical examination and investigation as CBC  to detect anemia and infection, glucose level, blood pressure measurement, PSA for prostate problems, urine analysis, renal and liver function tests, ECG and ECHO for cardiac problems...etc

Causes of sexual issues:

• Stress and anxiety
• Dibetes
• Taking medications
• Urine tract infection
• Prostate problems
• Hypertension
• Thyroid and testosterone problems...etc