A member asked:

If i have a shampoo allegy then if i put shampoo on my arm then also it will cause an allergic reactn right? coz my blood will react to it?

A doctor has provided 1 answer
Dr. John Chiu answered

Probaby: but since you don't leave the shampoo on the hair for more than minutes, placing it on the skin undiluted may cause an irritant and not an allergic reaction. Even if you are truly allergic to one of the ingredients, it may take from 24 to 72 hrs to show a reaction. This is not a task for amateur.

Answered 2/10/2016

1.6k views

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