SOS FACE AND BODY Tonic is great for daily use for the whole body. It can be used by people with skin complaints, such as dark spots on the skin, rashes, blemishes, acne, or eczema which affects up to 20% of children and around 3% of adults. Eczema often starts with itching and develops into a rash, often on the knees, hands, face, feet and wrists. Psoriasis is caused by the building up of new cells faster than the body can remove them.