Gum recession is known as gingival recession, and the treatment of receding gums at 30 years old includes removing the factors that lead to gingival recession, dealing with or preventing the complications of gingival recession, and repairing the shape of the gums by using membrane gingival surgery, as follows. 1. Remove the factors leading to receding gums: remove plaque on the gums and under the gums through periodontal scaling and scraping, change the brushing habit, remove the occlusal trauma, adjust the excessive orthodontic force, and correct the defective restorations. 2. Handle or prevent the complications of gingival recession: gingival recession may cause root surface caries, dentin sensitivity and other complications, which can be prevented by filling or crown restoration treatment. 3. Use membrane gingival surgery to repair the gingival morphology: the exposed root surface can be covered by lateral transposition flap, free gingival grafting, connective tissue grafting and so on. It is recommended to visit the hospital in time to receive early professional treatment.