No Length Increasing In Pumping?

I have been pumping for 3 weeks now. But the thing is when I pump my penis doesn’t seem to be increasing in length but only a little by girth. My erection is 5.7inches and when finish pumping it stays at 5.7inches. My girth goes from 4.5 to 4.75inches. Am I doing anything wrong? Also my penis is uncircumsized and whenever I finish pumping my penis seems to form some type of bubble looking towards the softer skin on my shaft. I pump between 15-30 minutes, in between sessions.

If you are looking for length gains from pumping you need a cylinder that you fill girthwise. There are probably better techniques if you are soley looking for length.

Just pumping is not a complete routine, jelq between pumping sessions and consider adding some stretching.

Vacuum Pumping 101 is a good place to start if you want a rounded routine and are happy about girth gains.

If you are entirely new to PE consider leaving the pump alone for a while and working with a manual routine, then adding pumping later as you need to work girth more.

It’s way to soon to expect gains out of the cylinder. You haven’t been at it long enough. Are you using constant heat when you pump?