If this is combined with rhinitis, the condition is termed "allergic rhinoconjunctivitis".
The symptoms are due to release of histamine and other active substances by mast cells, which stimulate dilation of blood vessels, irritate nerve endings, and increase secretion of tears.
But we can see exclusive "matches" between plants and insects even when pollination is not involved.
Some Central American Acacia species have hollow thorns and pores at the bases of their leaves that secrete nectar (see image at right).
If you or your child has warts of any kind that cause embarrassment, discomfort or pain, seek advice from your doctor.
Illnesses and infections can delay ovulation (the release of an egg from your ovaries), and this can make your period come later than expected.
Many plants and their pollinators are so reliant on one another and their relationships are so exclusive that biologists have good reason to think that the "match" between the two is the result of a coevolutionary process.
This system is probably the product of coevolution: the plants would not have evolved hollow thorns or nectar pores unless their evolution had been affected by the ants, and the ants would not have evolved herbivore defense behaviors unless their evolution had been affected by the plants.
There may also be pain, burning, scratchiness, or itchiness.
Am I going to wake up and find out he's quit breathing?
Coevolution The term coevolution is used to describe cases where two (or more) species reciprocally affect each other's evolution.