Soap, usually divided into hard soap, soft soap and butter soap 3 kinds.If add certain drugs in soap, then become a medicated soap, such as sulfur soap, sandalwood soap, etc.
Hard soap that is often said that "smelly soap", its high alkali content, to oil decontamination capability, but also has a bigger stimulus to the skin, when repeated use, can make the skin dry, rough, peeling phenomenon such as soon.Therefore, hard soap generally used only for laundry, not for a bath.
Soft soap is what we normally used in the "soap".Its low alkali content, less irritating to the skin, so all can be used normal persons and patients with psoriasis.Effect on skin can have good dandruff.
A fat soap soap also called fatty, excluding alkali.Soap many children fall into this category.Suitable for women to use.
Carbolic soap, sulfur soap, coal tar soap, boric acid soap, suzhou soap, such as sandalwood soap soap, also can be used for patients with psoriasis.But if the patient is allergic to some kind of soap, should avoid to use.