Can implants make armpit fat less noticeable? Also, can the placement of the implant change the look of the arm crease? (photo)

This is difficult to answer without an in person exam. In general, implants give you more of what you already have. Any area that is asymmetric or misshapen can become more noticeable with an augment. Again, a consultation with a board certified surgeon would give you a more definite answer.

I have had many patients with your concerns.  There are several options for treatment of this problem in my experience. Many patients will do well with implants alone, provided the dimensions of the implants are appropriate. Others benefit from liposuction at the time of breast augmentation.  The best way to learn what is right for you is with a consultation with a surgeon certified by the American Board of Plastic Surgery.  Your photo suggests that the first option may work for you, but it is impossible to know without an examination. 

Thank you for your question.  Anterior bra roll fat can be liposuctioned before, during or after breast augmentation surgery.  Discuss this matter further with your surgeon. Best wishes

Axillary fullness can be from fatty tissue or actually breast tissue.  An implant may soften the appearance, but in certain circumstances I have found it helpful to utilize liposuction (either conventional tumescent or ultrasonic) to remove tissue and contour this area when performing breast augmentation. I perform this frequently for breast lifts and breast reduction as it works quite effectively.  Direct examination of this area would be helpful in defining a treatment plan.

Yes, but the posted photo is so dark but I have been able to camouflage the axillary anterior tail with properly placed implants....