Discussion on the use period of azelaic acid
There is a hot debate on Reddit today about whether azelaic acid is suitable for morning or night use. Azelaic acid has attracted much attention in the field of skin care, but there are different opinions on its best application period.

It is said that it is best to use in the morning. When the skin is first waking up in the morning, it needs to protect against external intrusions. Azelaic acid has anti-inflammatory and antibacterial properties, which can help the skin resist pollutants, ultraviolet rays and other adverse factors encountered during the day. It can soothe skin inflammation, prevent the intensification of inflammation caused by external stimuli during the day, and regulate oil secretion, so that the skin remains fresh during the day and does not become oily.

It is also used at night. Night is when the skin repairs itself, azelaic acid can work in depth at this time. It can improve the exfoliation of the skin, help the old exfoliation, and make the skin smoother and more delicate. Without the interference of ultraviolet rays at night, azelaic acid can focus on its whitening and light spot effect, dilute the pigmentation generated during the day, and use it for a long time, or it can make the complexion more even and shiny.

When using azelaic acid, pay attention to the skin's tolerance. It should be used in small amounts and low concentrations at the beginning, and then increase as appropriate when the skin adapts. Whether used in the morning or at night, it should be used with appropriate skin care procedures, such as cleansing, moisturizing, etc., to achieve the best skin care. As for whether azelaic acid is more appropriate to use in the morning or at night, it depends on individual skin type, needs, and skin reactions after use.