The answer to 'why is my fascia clogged gutters' is that a clogged gutter can cause debris to build up and spill over onto the fascia board. This can lead to the fascia becoming clogged and preventing proper water drainage. Symptoms of a clogged fascia include water stains, rotting wood, and pest infestations. To fix this issue, you'll need to clear the clogged gutters and clean the fascia board.
In many cases, this can be a DIY project, but if the fascia is severely damaged or the gutters are difficult to access, it's best to call a professional roofing contractor. They have the right tools and expertise to safely and effectively clear the gutters and repair any fascia damage.