Please rest assured that masturbation has absolutely no effect on penis size; this is a common myth and does not cause any shrinkage. Regarding treatments, there are no scientifically proven, safe medicines, pills, or creams that can permanently increase penis size. While some devices like penile traction extenders exist, their results are minimal and carry risks of tissue damage. Surgical options carry high risks of complications and are reserved only for rare medical conditions. Most men who worry about this actually fall well within the normal anatomical range. If you feel anxious, consulting a urologist can provide personalised reassurance.