First off dental recession is caused by different reasons. Periodontal Disease, Malocclusion, Bruxism of teeth, trauma, or sometimes orthodontics. Its best to know which one or factors are causing the recession and address the problem.
Routine Dental exams and cleanings, Fluoride use to prevent cavities, and custom night guards all help guard against recession

Use a softbristled toothbrush and gentle brushing technique to avoid further gum damage. Floss daily, use fluoride toothpaste, avoid tobacco, and visit your dentist regularly for cleanings and gum health monitoring.

1. Gentle brushing technique. Use a softbristled toothbrush to avoid damaging gum tissue. 2. Brush at a 45degree angle to the gum line, using small circular motions. 3.Avoid aggressive brushing, which can worsen gum recession. 4.Use a nonabrasive toothpaste that is formulated for sensitive teeth. 5. Floss carefully and daily. 6.Rinse with a gentle mouthwash. Use alcoholfree mouthwash. 7.Keep up with the regular dental visits. 8.Address underlying causes such as Bruxism Misaligned bite Smoking habit. 9.Watch you diet. Limit sugary and acidic foodsdrinks. Stay hydrated and eat a balanced diet rich in vitamins especially vitamin C and calcium to support gum health.

Brush up to the gum line, not on the gums and use a soft brush.