Pollen allergies are common in Leuven, Belgium. They occur when the body's immune system reacts to pollen from trees, grasses, and weeds.
Tree pollen is released in early spring, usually from February to April. Hazelnut, alder, and birch trees are the main culprits. Their pollen counts are highest on windy days.
Grass pollen follows in late spring and summer, from May to July. This is the most intense pollen season in Leuven. People with grass pollen allergies often suffer the most during this time.
Weed pollen is released in late summer and autumn, from August to September. Nettles and sorrel are common allergy triggers. Pollen counts can vary each year, depending on weather conditions.
When pollen counts are high, we suggest doing these things to help with allergies, especially on windy days when pollen is flying around.