Stinging Pain (Urination) Red colour.

While Urinating, I feel a Stinging, Needle Piercing like Pain just inside of the Penis Glans and it lasts for only 3-4 seconds, remaining urine passes Normally. Sometime it feels as if There is a Cut inside of the Penis Glans. Suffering from this problem for almost 2-3 years. Consulted many doctors, all of them tried to cure it by considering this as UTI and prescribed many medicines along with Anti-Biotics. But, Nothing Helped. State of the Problem evn today is same as it was 2-3 years ago. Tested Urine, Culture test is Good, Nothing Found. In Urine Routine test, sometimes 2-3 and sometimes 5-7 RBC found, but doctors prescribed medicines for that at that time. Did CECT Scan, USG, MRI Scan - Kidney, Prostate are Normal. CECT Scan,MRI mentioned Bosniac Type 1 Cyst, and MRI Test mentioned Cystitis. All my Test reports were seen by the specialists. I am suffering heavily. Most of the time the colour of Urine is Yellowish, some times it seems the colour is mixed with Red Colour.