For what length of time do we have to keep toothpaste on pimples?

One hour: About an hour. But it wont work well.

Do not recommend: So called natural remedy to skin pimples does not apply any more. Tooth pastes today contain many ingredients that may actually irritate your skin lead to skin burning.

Save for your teeth: Toothpaste is great for cleaning your teeth, but not quite formulated for your skin. You would be better off using a product produced for treating pimples. Many posters on this site have asked your question, then followed up by asking how to treat the irritated skin.

Toothpaste : Is not an efficacious treatment for acne - and cause pain ; skin irritation.

Never: This can cause a chemical burn on your face anywhere you apply it. Steer clear of the home remedies when it comes to your face or you will pay a price.

Don't do it: Not effective for treating acne, and may cause chemical burns on your skin and may result in permanent scars. DO NOT USE TOOTHPASTE. Try an OTC acne preparation, follow package directions to the letter. If not adequately effective, see a skin specialist, a Dermatologist.