What is the ruling on feeding needles and other items, and perfumes, during fasting?

Question : May Allah reward you, Shaykh Muhammad. There are new things that have appeared in Ramadan: feeding needles, whether nutritional or non-nutritional, perfumes, and other things for the fasting person.

Answer : Yes. The needles taken by the fasting person are divided into two categories. The first is the nutritional type, which allows one to dispense with food and drink. These break the fast because they are equivalent to food and drink, even if they are less than that in reality. However, since they contain something of the meaning of food and drink, they break the fast.
The second category is needles that do not allow one to dispense with food and drink. These do not break the fast, whether the person takes them in the muscles or in the veins. This is because the fasting person has fasted by the command of Allah in accordance with the Shari'ah of Allah. It is not possible for us to invalidate his fast, which was by the command of Allah in accordance with the Shari'ah of Allah, except with valid Shari'ah evidence that absolves the conscience. Because telling a Muslim that his worship is defective is not a trivial matter. Therefore, one must verify that this thing invalidates the worship, or at least be convinced, based on Shari'ah evidence, that this thing invalidates the worship. This is regarding needles. So the conclusion is that nutritional needles, which allow one to dispense with food and drink, break the fast, and anything other than that does not break the fast. As for incense and other perfumes, they do not invalidate the fast. The fasting person may perfume his head, his beard, his clothing, or any part of his body.
He may also use incense, but he must not inhale the smoke of the incense, because the smoke has substance, and if he inhales it, it reaches his stomach. The Prophet (peace and blessings be upon him) said in a hadith of Luqayman ibn Sabi'ah: This indicates that what reaches the stomach through the mouth...