Sebaceous Gland
Always attached to hair follicle with 1 to 6 on each follicle
most numerous of forehead, nose, chin (T zone) and scalp
produces (secretes) sebum (oil)
Normal Sebum Flow
- Protect skin from mild chemicals
- Protect internal moisture content
- Skin remains clean with no blocked pores, infections don't build up
Excessive Sebum Flow:
- Glossy tone
- Blemishes occur as pores block, infections can occur
Low Sebum Flow:
- Dry Flaky due to moisture loss
- Skin easily irritated by mild chemicals
- Dull tone
- Millions over the body
- Controlled by the nervous system
- Activated by the body heating up from infection, illness or exertion, and when in shock, nervous or anxious
- Some people perspire excessively
- Most numerous in palms of hands, forehead, armpits and soles of feet
Sebum and sweat combine on the skin to form the ACID MANTLE.
ACID MANTLE
- Slightly acid pH4.5 to 5.5
- If acid mantle is removed, washing away harmless bacteria (non-pathogenic) that lives in the acid mantle, it allows harmful bacteria (pathogenic) to invade, infection can follow. Non-pathogenic bacteria are one of our natural defences against pathogenic bacteria.
- Skin is susceptible to chemical and physical irritation without the acid mantle.
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