There are several tips of hip bursitis as it always goes back to anatomy. Trochanteric bursitis which is lateral to the hip. Which creates pain along the lateral hip.
Then there is iliopectineal bursitis where the bursa is located mid femur and the pain is located more in the front that can refer up into the hip.
Depending on which type the person has, you want to avoid deep hip flexion or squats that will
irritate both types.
Training should focus on strengthening the glute medius, glute max as well as strengthening the core.
It is also very important to stretch the hip flexors, quadriceps, ITB and quadratus lumborum.