The answer to 'lawn brown patches' is that there are several common causes, including drought, disease, insect damage, or improper mowing and watering practices. Brown patches can be circular or irregular in shape, and may start small before spreading across the lawn. Solutions can include adjusting your watering schedule, aerating the soil, applying fertilizer, or treating for pests or diseases. In some cases, you may need to reseed or resod affected areas.
If the brown patches cover a large area or persist despite your efforts, it's best to call in a professional landscaper or lawn care specialist. They can diagnose the underlying issue and recommend the most effective treatment to restore your lawn.