Taking an antibiotic acts as a natural selection event. It kills susceptible bacteria, but the single microbe that survives due to natural resistance will rapidly repopulate, creating a new, fully resistant colony. This process occurs every time an antibiotic is used.
Bitter flavors from plants like coffee or wormwood (vermouth) trigger taste receptors that stimulate digestive activity. This process draws a large volume of blood to the digestive system and away from the body's periphery, which can help lower overall body temperature during a fever.
Ancient medicine classified problems as "hot" or "cold." If you instinctively want a hot water bottle for a cramp or headache, it's a "cold" problem treatable with warming remedies like ginger. If you'd prefer an ice pack, you need cooling remedies instead.
Spices like ginger and chili don't actually "burn" you. They stimulate pain fibers in your mouth and digestive tract. This triggers a reflex response called hyperemia, which opens up blood vessels, increases blood flow, and creates the sensation of warmth without any real change in temperature.
Before committing to a potent natural remedy, you can determine what suits your body by trying low-dose herbal teas. This allows you to easily discover whether your system responds better to warming remedies, like ginger or fennel, or cooling ones, like peppermint, thus guiding your future choices.