Hi, I masturbated quite hardly about four days ago and before masturbating, my penis was erect for quite long time and i pushed my pelvic muscles really hard to get a harder erection. After masturbation I am having a strange feeling of strain at the base of my penis. It is more prominent on the right side where penis is connected to the body and I am having problems in pushing my pelvic muscles like I used to do. It is not very painful but i can feel that some feeling is present. Is this the case of a penile injury and will it be healed in a few days if I keep the sexual activity to a minimal?? Thanks you. Your answers will be much appreciated.