Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Get emergency help for rapidly spreading clusters of painful blisters or open sores with fever or marked illness.
Breathing difficulty or swelling of the lips, tongue or throat also requires emergency help because these are signs of a severe allergic reaction, not typical pompholyx.
Contact a healthcare service promptly if the skin becomes increasingly painful, hot, swollen or red, or develops pus or spreading crusts.
These can be signs of bacterial infection.
Seek urgent same-day assessment if redness is spreading quickly, you develop a fever, or you feel generally unwell alongside worsening skin symptoms.
A serious viral infection can sometimes resemble an eczema flare and needs urgent treatment.
Arrange a routine appointment if this is your first unexplained blistering outbreak.
You should also seek advice if symptoms keep returning, are not improving with your usual treatment, or are making it difficult to sleep, walk or use your hands.
Every sign above is quoted from the sofidex article on Pompholyx eczema. If you are not sure, err upward — it is always reasonable to be checked.