Can We Use Soap After Wearing Ihram?
Question

What is the ruling on cleaning oneself with scented soap and shampoo, for the pilgrim in ihram?.
Praise be to Allah.Shaykh Ibn `Uthaymin (may Allah have mercy on him) said: 
There is nothing wrong with the pilgrim in ihram bathing or washing himself . It is proven that the Prophet (blessings and peace of Allah be upon him) bathed when he was in ihram. 
With regard to shampoo, it seems that its scent is not perfume ; rather it is a scent and fragrance that is well liked, as in the case of mint and other fragrant leaves. What matters is that whatever is perfume is not permissible for the pilgrim in ihram to use . (Majmu` Fatawa Ibn `Uthaymin 22/160) 
And Allah knows best.