What is this red spot on my breast? I had implants 4 years ago (Photo)

Good morning,
It is probably nothing at all but it is impossible to tell from this photo- if it is concerning then perhaps a trip to the dermatologist would give you the answers you seek!

It is impossible to evaluate nature of this lesion based on this photo. In person consultation with your PS would help. Most likely benign lesion of vascular origin. Good luck.