Are Air Bubbles in Implant Normal?

This Is perfectly normal and will disappear in the next few weeks. It is from air and fluid (irrigation, local anesthetic, serum, etc) in the pocket which will be naturally absorbed over time.

It would be
extremely unusual to have free air within the breast pocket four weeks after
surgery.For this reason, what you’re
feeling is probably related to a bulge in your implant.This is noticeable because of the thinness of
your overlying soft tissue.This also
explains the rippling that you’re experiencing, as well.Breast augmentation has extremely
high satisfaction rates, but occasionally rippling can occur following this
procedure.This can occur with either
saline or silicone breast implants.Several factors have been associated with rippling following breast
augmentation.These include saline
implants, large implants, thin soft tissue, and placement of the implants on
top of the muscle.The potential for rippling can be
decreased in several ways.It’s
important in high risk patients to avoid using implants that are large relative
to the patient’s native breast tissue.Firmer implants, such as silicone and cohesive gel implants, can also decrease
the potential for this problem.Submuscular placement decreases rippling by increasing the soft tissue
coverage over the implants.Surgeons
should avoid over-dissection of the pocket and avoid implants that are wider
than the patient’s breast tissue.Finally, overfilling the implant when using saline may help to minimize
rippling.Despite these maneuvers, rippling
occasionally may still occur.It’s important
to realize that in the vast majority of patients, rippling isn’t a problem and
even when it does occur, most patients are still very happy.If you’re concerned about rippling
following breast augmentation, consultation with your plastic surgeon is
appropriate.Depending upon the
specifics of your previous procedure, your surgeon should be able to formulate
a treatment plan that’s appropriate for you.

Thank you for the question.

Although you may be feeling the implant close  to the surface  you are not feeling air within the silicone gel implant.  It is likely that you're feeling a “knuckle” of the implant  through an area of the breast tissue where there is least coverage.

Consultation with your  plastic surgeon may be helpful to give you peace of mind and to discuss treatment options.

I hope this helps.