Painful intercourse after childbirth is caused by vaginal dryness, which may be caused by vaginitis or lack of vitamin B2, etc. It is best to go to the hospital for examination and reasonable treatment. If it is vaginitis, it is advisable to use anti-inflammatory drugs, such as metronidazole suppositories, and potassium permanganate for cleaning and disinfection. If there is a lack of vitamin B, it is best to supplement vitamin B2 reasonably, and it is also recommended to pay attention to local hygiene to avoid infection. It is also recommended to pay attention to local hygiene and avoid infection. Pay attention to eating more vegetables and fruits, change underwear regularly and do not eat spicy and stimulating food. If the vagina is dry, you should use lubricant under the guidance of a doctor. It is also recommended to abstain from intercourse and not to have intercourse too often to avoid aggravating infection.