Lyme disease can cause a rash that often looks like a bullseye pattern. The erythema migrans rash appears in 70% to 80% of people infected with Lyme disease. Lyme disease is not spread from person to ...

Don’t panic if you see spots on your tree’s leaves or something strange on the bark. Get to work diagnosing the problem with this guide that features pictures of common tree diseases and pests that ...

World Mosquito Day is observed on August 20 to commemorate the discovery that female Anopheles mosquitoes transmit the malaria parasite to humans. Dengue is a mosquito-borne viral disease that can ...

Editor’s Note: This essay series is written by Mercy Street's medical, historical and technical advisor, Stanley B. Burns, MD of The Burns Archive. Before war in the twentieth century, disease was the ...

Morgellons disease causes black, white, red, or blue fibers to appear under the skin or protrude from it. People may also feel crawling, stinging, or biting sensations in their skin, joint pain, and ...