Sensitive skin has a low toleration level to certain products or environmental conditions. People with sensitive skin may react fast to chemicals, heat or wind by developing red, blotchy and sore skin. Different people have various levels of skin sensitiveness. Likewise, some people can have a very grim reaction, while others only have a mild reaction.

Over-active glands cause oily skin, which produce too much sebum. Sebaceous glands produced the sebum. It's required as it helps lubricate your skin and carries away dead skin cells. Too much sebum is being produced when the skin is oily. The skin becomes lifeless and oily and pores may become clogged.

The additional secretion of sebum can be due to many factors.

Dry skin has a low level of sebum, which is the skin's natural lubricator. As it doesn't have enough sebum, it dries out simply and isn't able to keep the correct amount of moisture required for unblemished skin.

There are various factors causes dry skin. It is commoner in winter when the cold outside and the heat within contribute in drying up the skin.