Pollen is an airborne allergen that may set off numerous asthma symptoms in sensitive people at certain times of the year. Maple is one type of tree pollen.

Source: American Academy of Allergy, Asthma and ImmunologyMaple pollen is one of the pollens sensitive people need to avoid in the spring.
Pollen are tiny egg-shaped male cells found in flowering plants that they use during the fertilization process. The size of a typical pollen spore is smaller in diameter than a human hair. There are different types of pollen. Some are large and waxy, while others are light, small and dry. Light, dry pollens are easily picked up and disseminated by air currents and wind.
In the early spring, the pollens usually most responsible for causing asthma symptoms are tree pollens. The types of trees most likely to produce pollens that cause allergic symptoms are:
- Ash
- Birch
- Cypress
- Elm
- Hickory
- Maple
- Oak
- Poplar
- Sycamore
- Walnut
- Western red cedar
The amount of pollen in the air at any given time can vary, depending on a variety of conditions, including heat, humidity and wind. There are steps you can take, though, to avoid pollen and keep allergy and asthma control steady.