Frequent urination has many causes like UTI,
STDs - herpes, chlamydia and gonorrhea, Stress, Caffeinated beverages , large amount of water consumption,Small bladder,
Diabetes, overactive bladder,Alcohol consumption.
Feeling of incomplete voiding and difficulty in urination could be because of urethral stricture, cystitis, infections, any spinal cord injury or diseases.please consult urologist soon..