There can be several reasons for a rise in body temperature. One common cause is an infection, such as a cold or flu, which triggers the body's immune response and raises its temperature to fight off the infection. Other possible causes include physical exertion, hormonal changes, certain medications, and environmental factors like hot weather or being in a heated room. It's important to monitor your symptoms and seek medical attention if necessary. To lower your body temperature, you can try drinking plenty of fluids, resting in a cool environment, using a damp cloth on your forehead or wrists, or taking over-the-counter fever-reducing medication like acetaminophen or ibuprofen. However, if your symptoms worsen or persist for an extended period of time, it's best to consult with a healthcare professional for further evaluation and guidance.