The answer to 'patio dying' is that there are several common causes, including improper drainage, excessive foot traffic, or pest/weed infestations. Symptoms may include discoloration, cracking, or uneven surfaces. Solutions can range from resealing the patio, to replacing damaged pavers or tiles, to addressing underlying drainage issues.
If the damage is relatively minor, some patio repair work can be done as a DIY project. However, for more extensive or complex issues, it's best to call in a professional landscaping or patio contractor to properly diagnose and fix the problem.