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 trouble breathing, swelling of the face or throat, or other signs of a severe allergic reaction.
Contact your healthcare team promptly if you develop increasing redness, warmth, swelling, drainage, fever, worsening pain, or a lump that continues to enlarge.
Also call if the wound opens or bleeding returns after initially stopping.
Seek urgent medical help for bleeding that does not stop after firm, continuous pressure, rapidly increasing abdominal swelling, fainting, severe weakness, or severe pain.
And for anyone, someone who:
Mild bruising, slight tenderness, and a small spot of blood on the dressing are generally handled through routine aftercare unless they worsen.
Every sign above is quoted from the sofidex article on Abdominal wall fat pad biopsy. If you are not sure, err upward — it is always reasonable to be checked.