Can we use vitamin c serum over chemically peeled area?

It’s best to wait at least 7-14 days post a chemical peel, that depends on which type of peel you ( glycolic, jessner, salicylic or TCA) you had. Your skin could still be sensitive post peels and you want the peel to be effect and have little or no sensitivity while the skin is still peeling. It’s also very important to apply daily sunscreen with more than 30 spf to protect the skin.