Pollen allergies affect many people in Castelo Branco, Portugal. They occur when plants release pollen into the air. This irritates eyes, noses, and throats.
Trees, grasses, and weeds produce pollen. In Castelo Branco, trees pollinate from January to April. Grasses pollinate from May to July. Weeds pollinate from August to October.
Peak pollen seasons vary. Tree pollen peaks in March. Grass pollen peaks in June. Weed pollen peaks in September. These peaks cause worst symptoms.
Pollen counts measure pollen in the air. High counts mean more pollen. People with allergies should stay indoors on high-count days. They should keep windows closed and use air filters.
When pollen counts are high, we suggest doing these things to help with allergies, especially on windy days when pollen is flying around.