There is no surgery without a scar as surgery is done through an incision in the glans and the penis.
Surgeons try to limit incisions to the midline of the lower surface of the penis as these incisions heal with the best cosmetic results and in many cases may look like the normal “median raphe” that is normally present in the lower midline surface of the penis.
Luckily, most children (85 %) with glanular (grade1), distal (grade 2) and the majority of proximal (grade 3) hypospadias heal with minimal scar especially if the operation is done by an experienced surgeon but there is no guarantee. Occasionally, some children may heal with obvious unsightly scar that may require further surgery.
The other important fact is that the aim of hypospadias surgery is to correct the chordee (penile curvature) and to bring the urethral opening to the tip of the penis and to try to make the penis look near normal as much as is possible. The penis may “LOOK” a bit longer after surgery if the surgeon corrects the curvature carefully by removing the tethering bands and NOT by dorsal plication (Nesbit procedure and its modifications) which shortens the upper surface of the penis.
A short penis before surgery will remain short after surgery (especially in grade III b and IV).