Treatments. Wella SP 2.6 Sensitive Lotion is the perfect daily protection for your itchy or tense scalp. This express shampoo will give immediate relief to calm irritation, and any feeling of tenseness. With its active complex this lotion actually helps to build up the skins own defence barrier, thus protecting the scalp from further irritation, so that the skin can regain its ability to protect itself against irritation. It will cool and condition sensitive scalps without overloading the hair.