Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Suspected acute DIC needs emergency hospital assessment.
If you are outside hospital, call emergency services for heavy or uncontrolled bleeding, vomiting blood, coughing blood, sudden confusion, fainting, severe breathlessness, chest pain, or signs of stroke.
Sudden coldness, severe pain, numbness, or blue-black colour in a hand, foot, finger, or toe also requires emergency care.
These signs can mean blood flow is severely reduced.
Routine follow-up is different from emergency care.
After recovery, scheduled visits may include blood tests, organ-function checks, medicine reviews, and management of the condition that caused DIC.
If you are already in hospital, promptly report new bleeding, increasing bruising, chest pain, breathing difficulty, reduced urine, or new pain and swelling.
Contact your care team sooner if bruising or bleeding returns, but do not wait for a routine appointment if bleeding is heavy or you feel acutely unwell.
Every sign above is quoted from the sofidex article on Disseminated intravascular coagulation. If you are not sure, err upward — it is always reasonable to be checked.