Throbbing implant 15 years old - could this be capsular contracture?

Yes, it could be a capsule. I would suggest meeting with a board certified plastic surgeon and being examined.

Hello, thank you for your question. Difficult to say since the incident took place 2 years ago, now causing the chronic pain symptoms. A full assessment in person would be the most beneficial to try and pinpoint the pain and potentially see what the cause. Typically capsular contracture starts earlier than 15 years. Consider talking to your family doctor and potentially getting a sonogram.

Hello!
I would recommend you see a board certified plastic surgeon for an examination. If you have any information pertaining to your prior implant surgery that would be helpful in your consultation. It is possible your implants are fine. Implants can wear over time and with significant dynamic activity, but even if the implants rupture, they should not travel outside the region of your breasts nor cause harm. The surgeon may decide to order an imaging test, like an ultrasound.
You can find a board certified plastic surgeon near you at plasticsurgery.org.
Best of luck to you!