Milia are not caused by moisturizers.
From healthline.com and many other credible sites:
Milia are small, dome-shaped bumps that are usually white or yellow. They’re usually not itchy or painful. However, they may cause discomfort for some people. Rough sheets or clothing may cause milia to appear irritated and red.
Milia types are classified based on the age at which the cysts occur or what’s causing the cysts to develop. These types also fall into primary or secondary categories.
Primary milia are formed directly from entrapped keratin. These cysts are usually found on the faces of infants or adults.
Secondary milia look similar, but they develop after something clogs the ducts leading to the skin’s surface, like after an injury, burn, or blistering.
Older children and adults
In older children and adults, milia are typically associated with some type of damage to the skin. This may include:
Milia can also develop if the skin loses its natural ability to exfoliate. This can happen as a result of aging.
Some ingredients in skin care and makeup products can cause milia in some people. If you have milia-prone skin, avoid the following ingredients:
- liquid paraffin
- liquid petroleum
- paraffin oil
- paraffinum liquidum
- petrolatum liquid
- petroleum oil
These are all types of mineral oil that may cause milia. Lanolin may also increase the formation of milia.
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