Skin roughness can stem from factors such as dryness, dead skin cell buildup, excessive sun exposure, environmental conditions, irritants and poor skincare habits. These factors can contribute to a rough texture and a lack of smoothness in the skin. 

Yes, exfoliating can help with rough and uneven skin texture by removing dead skin cells and promoting cell turnover. This reveals the smoother and brighter skin underneath. Use a face wash with exfoliating ingredients, such as AHA, for better exfoliation.

The time taken to see improvement depends on the products you are using and how regularly you are following your skincare routine.