Patch test usually tests only for true allergies.
Beside true allergies, you may also react to type 3 allergens, which are called intolerance.
For example, gluten intolerance and lactose intolerance and nightshade intolerance, sugar intolerance etc are not true allergies, but can also trigger Exfoliative cheilitis, eczema (atopic dermatitis), acne, seborrheic dermatitis, folliculitis, psoriasis, etc.
Rosin, Colophony, Elastoplast allergy
from:
https://www.allergybestbuys.co.uk/pages/colophony-rosin-allergy
Most commonly experienced as Elastoplast allergy
Colo ...
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