What causes itching?

Question

Out of curiousity.

Answer 1

itch

Answer 2

Medical causes of itching include dry skin, anemia, pinworm infection, hemorrhoids, hepatobiliary disease, herpes zoster, Hodgkin's disease, leukemia, lichen planus, mastocytosis, multiple myeloma, and Mycosis fungoides.

Pediculosis, pityriasis rosea, polycythemia vera, psoriasis, kidney failure, scabies, and thyrotoxicosis can all be a cause of itching.

Urticaria, tinea pedis, vaginitis, medications, and bedbugs can also be a cause of itching.

Answer 3

Well if you have eczema it means your skin is drying up twice as fast as normal people do which causes itchiness. So its dry skin which causes itchiness!

In hair nits/head lice  

Answer 4

it depends, if you get stung by a mosquito her spit is poison like and it makes you itch it. did you ever notice that if you scratch it it starts making the skin around it itchy to thats becuz the poison is spreading!!!

Answer 5

A lot of things can

    * Rash

    * Itchy rash - see causes of itchy rash

    * Skin inflammation

    * Pregnancy

    * Spots

    * Blisters

    * Allergies

    * Hives

    * Dry skin

    * Fungal infection

    * Some causes of local reaction or a particular area of skin itching include:

          o Eczema

          o Contact dermatitis

          o Poison oak

          o Poison ivy

          o Insect bite

          o Insect sting

          o Parasites

          o Scabies

          o Lice

          o Tick bite

          o Shingles

          o Dandruff - causing itchy scalp

    * Some diseases that cause an itchy rash include:

          o Hives

          o Blisters - see causes of blisters

          o Eczema - see causes of eczema

          o Lice

          o Threadworm

          o Scabies

Answer 6

Itch (Latin: pruritus) is an unpleasant sensation that evokes the desire or reflex to scratch. Itch has many similarities to pain and both are unpleasant sensory experiences but their behavioral response patterns are different. Pain creates a reflex withdrawal while itch leads to a scratch reflex.[1] Unmyelinated nerve fibers for itch and pain both originate in the skin, however information for them is conveyed centrally in two distinct systems that both use the same peripheral nerve bundle and spinothalamic tract.[2]

Historically, the sensations of itch and pain have not been considered to be independent of each other until recently where it was found that itch has several features in common with pain but exhibits notable differences.[3] The physiological mechanisms of itch are currently poorly understood and this is mainly due to the lack of animal models of itch. Pruritic stimuli mostly create the same reactions as noxious stimuli in experimental animals, but humans are capable of discerning the distinct features of itch and pain. Therefore human studies have provided most of the information regarding the processing of pruritic stimuli.[4]