A member asked:

L have hives on my scalp, i assume from a new shampoo i used. yesterday i went back to my old shampoo but my hives are still there. i cannot take anti?

A doctor has provided 1 answer
Dr. John Chiu answered

Contact dermatitis.: If you are indeed allergic to the new shampoo, it may take several days or even a week for the skin lesions to subside after the last exposure. In fact, a contact reaction does not start until 24-96 hrs after the actual contact and does not go away immediately simply because you have stopped using it.

Answered 8/20/2017

1.9k views

Thank

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