what are the leading causes of hives
â¢ Pollen. â¢ Cat dander. â¢ Insect bites such as bee ans wasp stings. Other causes of the hives include: emotional stress, bacterial-viral-fungal infections, hepatitis B, parasitic worms, food additives, plants, cold temperatures, heat, sweating, and dermatographism (irritation from pressure or tight fitting clothes).