All praise is due to Allah, and may peace and blessings be upon the Messenger of Allah.
There is no authentic evidence in the Sunnah of the Prophet ﷺ, nor from the Companions or early generations of Muslims, establishing that a bewitched person is affected merely by seeing the person who bewitched them.
However, some practitioners of Islamic ruqyah mention that a bewitched person may experience certain symptoms when seeing the person who bewitched them, such as bodily trembling or a feeling of heaviness in certain limbs, and similar symptoms.
Nevertheless, these symptoms must not be considered evidence that a particular person performed magic, nor is it permissible to accuse anyone of doing so without Islamic legal proof. The mere appearance of symptoms when seeing someone does not establish that this person performed magic.
The affected person should adhere to Islamic ruqyah, maintain regular remembrance of Allah, recite the Quran, and make abundant supplication. They should also consult a doctor if symptoms such as convulsions or choking occur, to determine their possible medical causes.
We ask Allah Almighty to grant healing to everyone afflicted and protect them from all harm.
And Allah knows best.