During a dog’s period, the genitals will swell with a small amount of blood and mucus, which is normal. Usually, starting from the 10th day of menstruation, the dog’s genitals will gradually reduce swelling, and will be completely swollen around the 15th day. Therefore, in most dogs, genital swelling will naturally subside about a week after their period ends.

However, if the dog's genital swelling has not subsided after the period is over, or there is redness, pain, or abnormal secretion If there are symptoms such as substances, it may be that the genitals have been infected. In this case, the dog should be taken to the pet hospital for examination and treatment in time to avoid further deterioration of the condition.