The answer to 'shrub bare spots' is that there are several common causes, including drought, pest damage, disease, or improper planting. Symptoms include thinning foliage, yellowing leaves, and bare patches in the shrub. Solutions can include improving soil conditions, applying mulch, pruning damaged areas, and treating any underlying issues like pests or disease.
For minor bare spots, homeowners can often address the problem themselves through basic maintenance and care. However, for more severe or recurring issues, it's best to consult a professional landscaper or horticulturist to properly diagnose and treat the problem.