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 symptoms suggesting anaphylaxis, including:
If you have been prescribed an epinephrine auto-injector, use it as directed and call emergency services.
And for anyone, someone who:
Do not wait to see whether an antihistamine works.
Further assessment is needed even if symptoms begin to improve, because symptoms can return.
Arrange a routine medical appointment if you develop hives, swelling, breathing symptoms, or repeated rashes after contact with gloves, balloons, condoms, or medical equipment.
You should also seek advice if workplace exposure is causing symptoms or you need a plan before surgery or dental treatment.
The article also says
A persistent cracked, painful, weeping, or blistering rash also needs assessment.
It may be irritant dermatitis, delayed contact allergy, infection, or another skin condition rather than immediate latex allergy.
Every sign above is quoted from the sofidex article on Latex allergy. If you are not sure, err upward — it is always reasonable to be checked.