Can I get a BBL if I get pains in my hip from past injuries?

If the cause of your pain has been diagnosed and you can receive clearance from the specialist who is treating your tendonitis, you have a BMI of 30 or less, and are otherwise in good health, you could be a candidate for liposuction and a BBL.
Swelling after the BBL may temporarily aggravate your condition, but this is really more about the source of your pain. The sciatic nerve is easily avoided in fat placement, as the injections are performed superficial to it.
Consult via email or Skype with a board certified plastic surgeon who can discuss treatment options with you.

Dear aubreynacole,
it is hard to tell for sure without an examination. If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

Most likely you can still have a BBL though it’s possible the procedure could potentially cause more pain or aggravate your previous injuries.

Please discuss during in person consultations.

Best,

Mats Hagstrom MD