Bone marrow, soft, gelatinous tissue that fills the cavities of the bones. Bone marrow is either red or yellow, depending upon the preponderance of hematopoietic (red) or fatty (yellow) tissue. In humans the red bone marrow forms all of the blood cells w
Bad Bugs: Identify Insects and Bug Bites What do bug bites look like? How do you treat bug bites? Why do bug bites burn? See spider bite pictures and learn how to identify bug bites from mosquitoes, bees, bed bugs, wasps, and more. See what their bites & stings look like and how ...
Skin injuries:Psoriasis can develop at the site of skin injuries, such as cuts, scrapes, bug bites, and severe sunburns. This is called the Koebner phenomenon. Climate:For many people with psoriasis, cold, dry climate worsens symptoms. Other Possible Triggers Following are somelifestyle factors...
Why do mosquito bites itch? When a mosquito bites you, its saliva goes into your blood and can cause a mild inflammatory reaction. Your immune system releases histamine in response to the bite, and that can cause itching and swelling in the area of the bite. ...
Figure 1: Picture of a sand fly biting a human arm. SOURCE: CDC/Frank Collins SLIDESHOW Bad Bugs: Identify Insects and Bug Bites See Slideshow Which type of leishmaniasis is most likely fatal? Many species of Leishmania cause leishmaniasis, a very diverse infection described by syndromes acco...
Painful and grouped in a small area, these bites are found on humans near the ankles, legs, waist, groin, armpits, elbows, or knees. In animals, fleas will infest and bite areas around their neck, ears, lower back, abdomen, and base of tails. Flea saliva can cause dermatitis in pets...