Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services if the discoloration appears with signs of a stroke, such as facial drooping, arm weakness, speech difficulty, sudden loss of vision, or sudden severe imbalance.
Emergency help is also needed for severe chest pain, sudden shortness of breath, a suddenly painful cold limb, or skin that is rapidly becoming black.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek prompt medical care for:
Increasing pain, tenderness, or swelling
Skin ulcers, blisters, firm lumps, or signs of infection
A foot or hand that becomes unusually cold, pale, blue, or numb
Fever or feeling unwell with a new, persistent skin pattern
These symptoms can indicate blocked blood flow or another urgent condition.
3
Does any of this apply?
Book an appointment
Make a routine appointment if livedo reticularis is new and persistent, has no clear link to cold, affects only one limb, or does not improve after warming.
It should also be assessed if it begins after a new medicine or repeatedly occurs with headaches, joint symptoms, numbness, or unusual tiredness.
Every sign above is quoted from the sofidex article on Livedo reticularis. If you are not sure, err upward — it is always reasonable to be checked.