My answer to this is 6 months. This gives your body enough time to heal. However, many find that their able to start earlier (approximately 3 months). No two persons will ever have the same journey. Remember, too much compression too soon is a big NO. This can potentially cause improper healing, burns and skin necrosis. Compression is key, however, waist trainers do not provide “EVEN” compression the same way a faja would. I’m not against waist training, however, to avoid complications, it’s best to wait until the majority of your swelling has subsided. Always remember to take it one step at a time & listen to your body.