It's a normal reaction: when a person itches, he scratches. But when he constantly itches, all he does is scratch, which over time can be embarrassing and annoying. Relief seems light years away, as the person lies in bed, scratching himself to sleep. The secret to ending this nightmare is knowing the reason behind the itch--and there are many possible reasons.
Skin Conditions
Skin conditions play a large role in persistent itching, and include psoriasis, dermatitis and scabies. This is not a complete list; however, these conditions typically affect specific areas of the body versus the entire body. For instance, psoriasis tends to affect the elbows, knees and back. MayoClinic.com notes that other signs include bumps, blisters and red, irritated skin.
Late-Stage Pregnancy
Constant itching may occur during pregnancy, especially during the later stages when stretch marks begin to develop on the breasts, thighs, arms and abdomen. MayoClinic.com states that a woman with a skin condition may find that condition worsening during her pregnancy. The Merck Manuals Online Medical Library adds that itching during the late-stages of pregnancy, while common, may also be a sign of mild liver problems.
Underlying Medical Conditions
Liver disease, anemia, certain cancers, kidney failure and thyroid problems are all medical conditions that can have persistent itching as a symptom. If this is the case, the itching tends to affect the entire body rather than one specific area, according to MayoClinic.com.
Allergic Reactions
Some people have allergic reactions that cause persistent itching. These include a reaction to certain foods, clothing like wool, some detergents and plants like poison ivy. To treat itching from these causes, a person needs to eliminate one item at at time until she finds the actual culprit.
Dry Skin
Dry skin can be caused by washing too much or low humidity, such as the case during cold winter months when the air tends to be dryer than usual. Dry skin does not have any other skin changes such as a rash.
