The answer to 'fascia curling shingles' is that curling or warping of the fascia board is often caused by moisture damage, improper installation, or age. This can lead to the shingles on the roof edge becoming loose or curling up as well. Symptoms include visible gaps or spaces between the fascia and roof edge, and shingles that are no longer flat against the roof.
The solution typically involves replacing the damaged fascia board and properly re-securing the roof edge shingles. This is generally a job for a professional roofing contractor, as it requires specialized tools and skills to safely access the roof edge and properly install new fascia. Attempting DIY repairs can be dangerous and may not address the root cause of the issue.