The answer to 'why is my toilet burst pipe' is that a burst pipe is typically caused by a blockage, freeze damage, or corrosion in the plumbing system. Symptoms may include water leaking from the toilet, low water pressure, or the toilet not flushing properly. Solutions can include clearing the blockage, repairing or replacing the damaged pipe, or upgrading the plumbing.
If the burst pipe is easily accessible and the damage is minor, you may be able to fix it yourself with basic plumbing tools and supplies. However, for more complex issues or if you're not confident in your plumbing skills, it's best to call a professional plumber to diagnose and repair the problem.