Do your children experience seasonal allergies brought on by the rainy season here in the Philippines?

My 7 y/o nephew experiences seasonal allergies. Oftentimes, the symptoms are continuously sneezing, nasal congestion, runny nose as well as formulation of dark/reddish circles in the eyes. Usually, it goes off during noon time but it occurs during early morning and evening. During this season, we usually let him wear a mask everyday whenever he goes out to reduce exposure to allergens and have him drink lots of water.