The next proceeding which will probably be induced, will be an extension of the inflammation to the bladder: the symptoms are a frequent desire to make water, and occasionally ulceration of the membrane lining the bladder follows, when a quantity of muco-purulent matter is discharged, which, mingling with the urine gives it the appearance of whey. Now and then the bladder takes on another form of disordered function: the patient will be seized with _retention of urine_, that is, a total inability to discharge his water, except by the aid of the catheter. A new and most perplexing feature about this stage of the proceeding is perceived: it is what is called _chordee_. The existing irritation excites the penis to frequent erections, which are of the most painful nature. The penis is bent downward; the occasion is, the temporary agglutinization of some of the cells of the _corpora cavernosa_ through inflammation, and the distension of the open ones by the arterial blood, thereby putting the adherent cells on the stretch, and so constituting the curve, and giving rise to the pain. This symptom is frequently a very long and troublesome attendant upon a severe clap; it is more annoying, however, than absolutely painful, as it prevents sleep, it being present chiefly at night-time when warm in bed. Occasionally the glands in the groin enlarge and are somewhat painful; they sometimes, but very rarely swell and break; they more frequently sympathise with the adjacent irritation, and may be viewed as indications of the amount of general disturbance present; as the patient gets better the glands go down, leaving a slight or scarcely perceptible hardness as it were to mark where they had been. The most painful of all the attendant phenomenon of clap is _swelled testicle_, or, as in medical phraseology it is called, _Hernia humoralis_.