Standard soap or shampoo, however mild, will have a drying effect on your skin if it's dry and sensitive. It is therefore important to use a shampoo that is intended for use on dry scalps/skin. Do not be concerned that soap substitutes do not foam - they are still effective at cleaning your hair and do not irritate your skin. Many people with dry skin find that long hot showers dry out the skin, therefore it is recommended to shorten the showering time. Use emollients such as creams or lotions immediately after showering to avoid unnecessary drying out of the skin.