Do you have to wash off the azelaic acid after use?

The correct name for azelaic acid is azelaic acid cream, and azelaic acid cream does not need to be washed off after use.
The main ingredient of azelaic acid cream is azelaic acid, which is a dermatologic drug used for the topical treatment of mild to moderate inflammatory acne vulgaris.
Azelaic acid cream is a topical medication, the specific use is to wash the skin and dry, azelaic acid cream on the acne into a thin layer, must be applied vigorously, so as to make sure that deep into the skin, wash your hands after application.
Adverse reactions to azelaic acid cream include itching, burning, irritation and tingling, and it is contraindicated for those who are sensitive to any of the ingredients in azelaic acid cream. It is important to note that in case of allergic or severe irritating reactions while using this product, the drug should be stopped immediately and appropriate treatment should be given.
The drug should be used under the guidance of a doctor, and if discomfort occurs, you should seek medical attention.