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
Get emergency medical help for:
Sudden or rapidly worsening loss of vision
A painful red eye with severe headache, vomiting, or halos around lights
Rapidly increasing pain or redness after eye surgery or injury
New flashes, many floaters, or a curtain-like shadow across your vision
Severe eye pain with marked swelling, fever, or difficulty moving the eye
These symptoms may be caused by scleritis or by another condition that needs immediate treatment.
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 urgent, same-day eye care if you develop a new painful red eye, especially if the pain is deep, wakes you at night, worsens with eye movement, or comes with blurred vision.
Contact an urgent eye clinic or ophthalmology service if one is available.
If you have had scleritis before, seek prompt advice when similar symptoms return.
Do not restart leftover corticosteroids or immune-suppressing medicine on your own because an infection can resemble a noninfectious flare.
New pain or vision changes should not wait until a scheduled visit.
3
Does any of this apply?
Book an appointment
Routine follow-up is used to confirm that inflammation remains controlled, monitor eye pressure and vision, and check for medicine side effects.
Every sign above is quoted from the sofidex article on Scleritis. If you are not sure, err upward — it is always reasonable to be checked.