Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Routine follow-up may be useful if symptoms continue despite consistent eyelid care, repeatedly return, or make it difficult to use contact lenses.
Follow-up also allows a clinician to check the cornea, tear film, eyelid glands, and response to treatment.
Arrange a non-emergency appointment if an eyelid lump lasts for several weeks, repeatedly develops in the same place, or causes eyelash loss.
These findings often have a harmless explanation, but they should be examined.
If prescription eye medicine is used, follow the planned review schedule.
Monitoring can be especially important with steroid drops or ointments.
Do not extend a prescription course without medical advice.
Long-term management may involve a simple maintenance routine, with more frequent care during flare-ups.
A clinician can help adjust that plan if it causes irritation or does not control symptoms.
The article also says
Blepharitis often follows a long-term pattern.
Every sign above is quoted from the sofidex article on Blepharitis. If you are not sure, err upward — it is always reasonable to be checked.