What is the ruling on using perfume while fasting, and what is the ruling on using toothpaste while a person is fasting?

Question:
May Allah reward you with good, and may He do you good. What is the ruling on using perfume while fasting? And what is the ruling on using toothpaste while a person is fasting?

Answer:
Using perfume with fragrances is permissible, whether on the clothing or the body; there is nothing wrong with it. However, using incense and inhaling it is not permissible for the fasting person, because the smoke enters his nostrils and extends to his brain and to the openings of his body, meaning it gives him energy and enters the inside of his body. It is not permissible to intentionally smell incense, and if he does so intentionally, it invalidates his fast. This is what is said regarding perfume: it is of two types. Liquid fragrances are permissible, but incense is not permissible to smell intentionally. Likewise, powdered perfume, such as musk powder and other things that become airborne, the fasting person should not smell this either, because it penetrates to his brain and to his stomach. Yes.