Prohibited food items and/or activities (that aggravate or intensify a sickness).
Certain food items are said to aggravate certain sicknesses and people are instructed to refrain from them. Also taking a bath or being exposed to rain or wind is said to aggravate sicknesses.
Because he ate something that is prohibited he again doesn’t feel well.
My prohibited food item is young coconut.
What is prohibited with that sickness?
If you take a bath and you have measles, it is a prohibited activity.