Just wanted to say that those that have issues with soap reactions and bumps at times. Avoiding fragrance oils is a good first step. Stick with unscented or essential oils if possible. Some essential oils are in fact highly beneficial. Some fragrances are fine for me. Others definitely don't agree with my razor exfoliated face.
Then you can narrow it down for ingredients from there.
I have had a good experience with Stirling tea tree soap recently. The powers of tea tree oil are well known. Powerful anti fungal, antiseptic, anti inflammatory actions. The exact same soap with a particular fragrance oil causes a neck rash that looks exactly like razor burn/bumps. The unscented sample was a result in-between the two, just a small amount of irritation. A sample with fragrance oils, but not the fragrance oil in the irritating soap had the same result as the unscented. A double check to minimise technique variables established the link. So I know from the fragrance ingredients that it is one or both of two particular fragrance oils.
Methodical process of elimination.
Then you can narrow it down for ingredients from there.
I have had a good experience with Stirling tea tree soap recently. The powers of tea tree oil are well known. Powerful anti fungal, antiseptic, anti inflammatory actions. The exact same soap with a particular fragrance oil causes a neck rash that looks exactly like razor burn/bumps. The unscented sample was a result in-between the two, just a small amount of irritation. A sample with fragrance oils, but not the fragrance oil in the irritating soap had the same result as the unscented. A double check to minimise technique variables established the link. So I know from the fragrance ingredients that it is one or both of two particular fragrance oils.
Methodical process of elimination.