The ideal moisture level for skin is between 30% and 50%. A bad moisture reading is anything outside of this range, and can lead to a variety of skin allergies and irritation.
Skin moisture is measured using a device called a corneometer. Corneometers use a variety of methods, such as electrical impedance, to measure the amount of water in the skin.
There are a number of factors that can affect the accuracy of a moisture reading:
The type of corneometer being used
The calibration of the corneometer
The temperature and humidity of the environment
The skin condition of the person being tested
It is important to note that a single moisture reading is not necessarily indicative of a skin problem. However, if you have multiple readings that are below or above the recommended range, you may want to see a dermatologist to rule out any underlying skin conditions.
If you have skin allergies that are caused by a bad moisture reading, there are a number of things you can do to treat the condition:
Use a moisturizer that is appropriate for your skin type. Moisturizers help to keep the skin hydrated and prevent moisture loss.
Avoid harsh soaps and cleansers, which can strip the skin of its natural oils.
Use lukewarm water when bathing or showering. Hot water can dry out the skin.
Wear gloves when handling harsh chemicals.
Avoid scratching the skin, which can irritate it further.
See a dermatologist if your skin allergies do not improve with home treatment.