Earlier in the spring, tree pollen is the main culprit. After that grasses pollinate, followed by weeds in the late summer ...

The culprit: tree pollen. Many in the metro may be waking up with extreme headaches and sinus pressure as the cedar, oak and birch trees bud. Tree pollen typically triggers allergies in the spring ...

Some of the most common tree pollens that cause allergies include birch, cedar, cottonwood, maple, elm, oak and walnut, according to the Asthma and Allergy Foundation of America. Grasses that ...