his pediatrician or pediatric urologist will need to examine him. it is not possible to offer you a definitive answer based solely on your description. yes it could be an inguinal hernia or a hydrocele. a torsion (twisting) is also possible but these are very painful and quite serious. i suspect he would be in obvious pain if this is happening but torsions can occur and quickly "de-torse" in some children. either way an examine will be required to make that important determination. if he is in pain due to this swelling or if the swelling is becoming larger an emergency room visit is warranted and an scrotal ultrasound is usually ordered to help make the diagnosis.
what can cause an infant boys scrotum to swell? . my 10 month old son has developed an almond sized lump in his scrotal sac over the last two days. it has grown somewhat over the last 24 hours. it has not changed in color or shape just size. i can see his testicles and the lump is higher up in the scrotum right under his penis and a little to the left. i think it may be an inguinal hernia but am wondering if it could possibly be something else. anyone have an instances of this?