Score 2: partial exposure of glans, prepuce (not congenital adhesions) limiting factor. Score 3: partial retraction, meatus just visible. Score 4: slight retraction, but some distance between tip and glans, i.e. neither meatus nor glans can be exposed. Score 5: absolutely no retraction of the foreskin. Cause
There are three mechanical conditions that prevent foreskin retraction:

The tip of the foreskin is too narrow to pass over the glans penis. This is normal in children and adolescents. The inner surface of the foreskin is fused with the glans penis. This is normal in children and adolescents but abnormal in adults. The frenulum is too short to allow complete retraction of the foreskin (a condition called frenulum breve).Pathological phimosis (as opposed to the natural non-retractability of the foreskin in childhood) is rare, and the causes are varied. Some cases may arise from balanitis (inflammation of the glans penis).Lichen sclerosus et atrophicus (thought to be the same condition as balanitis xerotica obliterans) is regarded as a common (or even the main) cause of pathological phimosis. This is a skin condition of unknown origin that causes a whitish ring of indurated tissue (a cicatrix) to form near the tip of the prepuce. This inelastic tissue prevents retraction.
Phimosis may occur after other types of chronic inflammation (such as balanoposthitis), repeated catheterization, or forcible foreskin retraction.Phimosis may also arise in untreated diabetics due to the presence of glucose in their urine giving rise to infection in the foreskin.Beaugé noted that unusual masturbation practices, such as thrusting against the bed or rubbing the foreskin forward may cause phimosis. Patients are advised to stop exacerbating masturbation techniques and are encouraged to masturbate by moving the foreskin up and down so as to mimic more closely the action of sexual intercourse. After giving this advice Beaugé noted not once did he have to recommend circumcision.Phimosis in older children and adults can vary in severity, with some able to retract their foreskin partially (relative phimosis), while others are completely unable to retract their foreskin, even when the penis is in a flaccid state (full phimosis). Treatment
Physiologic phimosis, common in males 10 years of age and younger, is normal, and does not require intervention. Non-retractile foreskin usually becomes retractable during the course of puberty.If phimosis in older children or adults is not causing acute and severe problems, nonsurgical measures may be effective. Choice of treatment is often determined by whether circumcision is viewed as an option of last resort or as the preferred course. Nonsurgical
Patients are advised to stop exacerbating masturbation techniques and are encouraged to masturbate by moving the foreskin up and down so as to mimic more closely the action of sexual intercourse. After giving this advice Beaugé noted not once did he have to recommend circumcision.