Understanding "פסיק רישא דלא ניחא ליה" (inevitable results from one's permissible action whereby one receives no benefit from).
If an Insect Is Bothering a Person So That They Cannot Sleep, Is One Allowed to Capture and Remove It?;
Washing Off an Item That Has an Insect on It (e.g., Utensils, Fruits);
Summing Up the Three Categories of Using a Tree;