Urethral Stricture
Urethra is the pipe-shaped organ in the penis from where we pass urine. Blockage to this passage causes symptoms where a patient has poor urine flow. This is called a stricture.

Anatomy
Urethra is divided in two parts :

Anterior Urethra
Posterior Urethra.
Anterior Urethra is further divided in to 2 parts

Penile Urethra: Lies in the penis
Bulbar Urethra: It is located behind and below the scrotum
Posterior Urethra consists of

Membranous Urethra—It is the spring, which controls urine and avoids leakage
Prostatic Urethra.

Etiology
Anterior Urethral strictures usually occurs due to:

Instrumentation
After Foleys catheter
Lichen Sclerosus (Skin Disease where skin color is white)
Sexually transmitted infections
Trauma
Idiopathic (Cause not known)
This stricture can occur in Bulbar Urethra or Penile Urethra or Pan urethra (Whole Urethra)

Posterior Urethral Stricture Occurs due to:
Trauma
Called as PFUDD (Pelvic Fracture Urethral Distraction Defect)
or PFUI ( Pelvic Fracture Urethral Injury)
Symptoms

Patients have poor flow
Burning of urine
Straining to pass urine
Bleeding at end of Urine
Feeling of incomplete evacuation

Rarely if neglected , then patients develops Kidney failure as urine gets stagnated in bladder and kidneys.