Indent on right breast under the armpit 5 weeks post-op (Photo)

It's only been five weeks since surgery. There's a good chance that the contour will improve as the implant settles and the muscle relaxes. You can see the contour of the top of your implant and the dent is where the implant ends. Assuming that your surgeon used a narrow enough implant for your breast dimensions, all should be well.Express your concerns to your doctor. But remember, five weeks is a very short time. 

I wounder if this irregularity is your implant.   I recommend a revisit with your surgeon to determine the cause and treatment.  There is very little to do for the first 3-6 month other than to just support the implant in its position.  Best Wishes!!

commonly happen when implants are placed under the muscle and it appears that is your situation. It can make shaving challenging sometimes.  If its something you feel on your implant, discuss your concerns with your surgeon.