I am having muscle twitching and on siting on hard surface I feel something pins in penis and this feeling is mostly after urine and and siting on hard surface for longer time. I used to surf on late night on a round cushion under neck after that this problem started. I have done kub ultrasound, urine routine everything is normal and blood test is also normal. I am having good urine flow. I used to masturbate daily but I have reduced it now. I have been given several antibiotics but no permanent relief please suggest me some medicines.