You can do this in the shower by rinsing your fingers off and putting one or two fingers up inside your vagina as far as they will go. Remove your fingers and you will notice some discharge sticking to your fingers. Rinse this off and repeat the process until you can put your fingers inside your vagina and no discharge sticks to them. It is important to rinse your fingers carefully because any soap on your fingers might be irritating to the inside of the vagina. Douching is rarely necessary, but it may decrease the risk of vaginal and bladder infections.
Some women prefer to douche as a matter of personal hygiene.
You may choose to douche frequently or not at all. Commercial douche products, deodorant tampons, deodorant pads and feminine hygiene sprays should be avoided. They may contain ingredients to which you should be allergic. Disposable douches containing only vinegar and water are acceptable, but they're not very economical. Sleeping without underwear is a good idea.