The answer to 'why is my junction box' is that there could be several common causes for issues with a junction box, including loose connections, corrosion, water damage, or improper installation. Symptoms may include flickering lights, shocks when touching the box, or a burning smell. Solutions can range from tightening connections to completely replacing the junction box, depending on the severity of the problem.
If the junction box issue is minor, such as a loose connection, you may be able to fix it yourself with basic electrical knowledge and tools. However, for more complex problems or anything involving exposed wiring, it's best to call a licensed electrician to ensure the work is done safely and up to code.