Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for difficulty breathing, faintness, or sudden swelling of the tongue or throat.
These suggest a severe allergic reaction rather than an ordinary eczema flare.
Seek urgent, same-day medical help if skin becomes increasingly painful, hot, swollen, rapidly more inflamed, or starts producing pus or extensive crusting.
Fever or feeling generally unwell with worsening eczema may indicate infection.
Get urgent assessment for a rapidly spreading, painful rash with clusters of blisters or round open sores, especially with fever, tiredness, or involvement near an eye.
These may be features of eczema herpeticum.
Arrange a routine appointment for a persistent itchy rash, uncertainty about the diagnosis, or symptoms that do not respond to your usual skin care.
Review is also appropriate for repeated flares, sleep disruption, frequent infections, possible work-related eczema, or treatment concerns.
Every sign above is quoted from the sofidex article on Eczema. If you are not sure, err upward — it is always reasonable to be checked.