Itch causes: Difference between revisions
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** [[Photodermatitis]] – (sun)light reacts with chemicals in the skin, leading to the formation of irritant metabolites | ** [[Photodermatitis]] – (sun)light reacts with chemicals in the skin, leading to the formation of irritant metabolites | ||
** Directly (e.g. [[morphine]]) | ** Directly (e.g. [[morphine]]) | ||
** Other drugs- [[Ofloxacin]], [[Tretinoin]] | ** Other drugs- [[Ofloxacin]], [[Tretinoin]] ,[[capsaicin]] | ||
**[[Lovaza]] | **[[Lovaza]] | ||
**[[Triazolam]] | **[[Triazolam]] | ||
Revision as of 19:17, 18 December 2014
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Causes
The feeling of itchiness can be caused by a movement of hair or the release of a chemical (histamine) from cells under the skin. Itchiness is regarded as protective, as it helps creatures remove parasites that land on their skin.
Itching can be caused by:
- Xerosis. This is the most common cause, frequently seen in winters. Associated with older age, frequent bathing in hot showers or baths, and high temperature and low humidity environments.
- Skin conditions (such as psoriasis, eczema, sunburn, athlete's foot and many others). Most are of an inflammatory nature.
- Insect bites, such as those from mosquitos or chiggers.
- Allergic reactions to contact with specific chemicals, such as Urushiol from Poison Ivy or Poison Oak.
- Hodgkin's disease
- Jaundice (bilirubin is a skin irritant at high concentrations)
- Polycythemia, which can cause generalized itching due to increased histamine
- Scabies or infection with lice or worms
- Thyroid illness
- Diabetes Mellitus
- Dandruff (an unusually large amount of flaking is associated with this sensation)
- Drug Side Effect- acetaminophen, caspofungin acetate, Hydrocodone bitartrate and acetaminophen, Ketorolac tromethamine, Naproxen sodium, Piroxicam, Tacrolimus
- Iron deficiency anemia
- Parasitic infections
- Psychiatric
- Medication:
- Allergy - (due to reaction of an individual's immune system to certain chemical compounds)
- Photodermatitis – (sun)light reacts with chemicals in the skin, leading to the formation of irritant metabolites
- Directly (e.g. morphine)
- Other drugs- Ofloxacin, Tretinoin ,capsaicin
- Lovaza
- Triazolam
- Tazarotene
- Travoprost
- Cholestasis
- Related to pregnancy:
- Drug side effects: Acetaminophen, Acetylcysteine, Conjugated estrogens, Spironolactone, Hydrochlorothiazide, Tolbutamide