Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency care for confusion, fainting, severe breathing difficulty, or other signs of serious illness.
Contact the treating team promptly if pain, swelling, warmth, drainage, or fever returns.
Increasing difficulty moving the joint also needs reassessment.
Seek urgent care for rapidly worsening joint symptoms or new fever during treatment.
Follow-up after bacterial arthritis is important.
The care team may monitor pain, swelling, temperature, wound healing, joint movement, and the ability to walk or use the limb.
Blood tests may be repeated to check whether inflammation is decreasing.
Keep follow-up visits even if the joint feels better.
Some infections return gradually.
These concerns are different from routine follow-up for gradually improving stiffness or weakness.
Routine antibiotics before dental or other procedures are not appropriate for everyone with an artificial joint; discuss individual circumstances with the relevant clinician.
The article also says
Take antibiotics exactly as directed and discuss missed doses, vomiting, diarrhea, rash, or other possible side effects with the treating team.
Physical therapy or a home exercise plan may be recommended once movement is considered safe.
Recovery can take time, especially after hip infection, surgery, prolonged illness, or infection involving an artificial joint.
Prevention depends on the situation.
Helpful measures may include treating skin or other infections, caring for wounds, avoiding injection drug use, and following surgical wound instructions.
Safer-sex practices and recommended testing can reduce the risk of gonococcal infection.
Every sign above is quoted from the sofidex article on Bacterial arthritis. If you are not sure, err upward — it is always reasonable to be checked.