Why do you get chills all of a sudden?

Sudden chills can occur due to various factors, including emotional responses, such as excitement or fear, which trigger the release of adrenaline. Physical causes might include exposure to cold temperatures, fever, or illness, where the body attempts to regulate its temperature. Additionally, chills can be a reaction to certain stimuli, such as music or memories, prompting a physiological response. If chills are frequent or accompanied by other symptoms, it may be worth consulting a healthcare professional.