When a second hair transplant is done in the same area as the first one, is there a chance hairs from the first will fall out?

Many patients have second surgeries in the same area as their first surgery to add fullness.  There is always a chance for damage to existing hairs but an experienced surgeon should be able to mitigate the risk.

Thank you for your question kamiahmad. It is very rare to
have previously transplanted hair shed with a second procedure. However, the
further away the follicles are from the optimal donor area, the more likely
they may be shed as they may not be as robust. Also using surgical loops can
minimize this.

Thank you for your question. If properly performed, the transplanted follicles from your first procedure should be permanent. A second transplant could cause some "shock loss" from the trauma to the tissue but generally these follicles will then grow back in. Shock loss is not common but does occur and it cannot be predicted.I hope this was helpful - Dr. Moore.

If the transplant is done with the correct precision and skill, it cannot lead to any harm to the existing hair. Since the transplanted hair tend to be permanent, they should not be affected by a second hair transplant session.

There is always a chance the hair from the first transplant may shed, and if it does it is very likely to grow back.  Surgeons should be meticulous about placing the second round of grafts between the existing hair, however, so it is somewhat technique dependent.  Even with perfect technique however, that can still be a risk.
Good Luck!

Second transplants are often performed after the hair from the first transplant has grown in and when it is done, the hairs that are already there can be carefully avoided during the second hair transplant

If your doctor takes the proper precautions, the transplanted hair from previous procedure should not be effected.