(Below you'll find a listing of the trees, weeds and grasses (together with images) causing problems for people with allergies this month).
If you suffer from pollen allergies (or think you may) you need to take extra care in the outdoors.
Typical hayfever symptoms include itchy and runny nose, sneezing, itchy and watery eyes. If you have these symptoms and have not seen a health professional you really should do so.
There are other pollen allergy related disorders with similar symptoms, including asthma.
Different allergens come into play at different times of the year. March to June are the "quiet" months.