Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for sudden shortness of breath, chest pain, coughing up blood, fainting, or severe difficulty breathing.
These can be signs of a blood clot in the lungs or another emergency.
Contact your surgical team promptly for increasing wound redness, warmth, swelling, drainage, or pain, especially if accompanied by fever.
Also seek prompt advice for a wound that opens, new calf pain or swelling, or a sudden change in your ability to walk.
Sudden severe hip pain, a shortened or twisted leg, or loss of movement may indicate dislocation or fracture and requires urgent assessment.
For routine concerns, such as slow improvement, ongoing swelling, medication questions, or difficulty with exercises, contact the team during normal working hours or discuss them at follow-up.
Every sign above is quoted from the sofidex article on Hip joint replacement. If you are not sure, err upward — it is always reasonable to be checked.