The wudu of a woman who applied a substance to her hand for three days

Question:
He says: Honorable Shaykh, may Allah grant you success. He says: A woman says that she applies a substance to her hand for a period of seventy-two hours, and this substance is not touched by water or anything else. So when performing wudu, this woman washes the entire hand except for this spot. What is the ruling on her wudu in that case? And what is the ruling on her prayer?

Answer:
If this is for treatment that she needs for treatment, and if she did not do it, it would cause her harm from pain or injury, then there is no harm. She performs tayammum for what the water did not reach, or what the water did not reach of the wound and its surroundings. She performs tayammum for it, performs wudu, washes the sound parts, and performs tayammum for the injured part, unless there is a bandage or a cast on it, in which case she wipes over it, and this is sufficient for injuries. As for a woman who wants to adorn herself and does this for the sake of adornment, this is not permissible. It is not permissible. She does not leave washing this spot for something that is not for treatment but for adornment. This is not permissible. Yes.