After a tooth extraction, you should generally start rinsing with warm salt water 24 hours after the procedure. Most dental professionals recommend rinsing two to three times daily, particularly after meals, for the first several days to a week. This helps keep the extraction site clean and promotes healing.

Specific recommendations often include:

• Frequency: 2-3 times daily, or 3-6 times a day for the first week. Some advise rinsing every 4 hours and after meals.
• Duration: Continue for several days, at least seven days, or up to 2-3 weeks.
• Preparation: Mix about half a teaspoon of salt in a cup of warm water until dissolved.
• Technique: Swish gently for about 30 seconds, then spit out carefully to avoid dislodging the blood clot.