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www.reference.com/article/causes-unexplained-weight-gain-women-fd716fb7e3512338

Unexplained or unexpected weight gain in women can occur due to abnormal growths, constipation, pregnancy or fluid retention, explains Healthline. Unexplained weight gain can also occur when hormones in the body change as a result of menopause or menstruation, certain medications and diseases such a

www.reference.com/article/popular-unexplained-photographs-b40f7458f7724289

One popular unexplained photograph is the "Solway Firth Astronaut" photo. Jim Templeman took a picture of his young daughter sitting in a field. When the film was developed, he was shocked to discover that there appeared to be an astronaut standing behind his daughter. He claims that there was nobod

www.reference.com/article/causes-unexplained-weight-loss-7bf02463fa3f8825

The different causes of unexplained weight loss include cancer, thyroid problems, diabetes, chronic obstructive pulmonary disease, depression, digestive disorders, AIDS and hypercalcemia, notes Mayo Clinic. Some other causes can be parasitic infections that cause diarrhea, drug abuse and an eating d

www.reference.com/article/potential-causes-unexplained-fever-children-78c1359e3ebd86fc

The main cause of unexplained fever in children is infection, which causes around 50 percent of all fevers of unknown origin, according to the University of Maryland Medical Center. Malignant or inflammatory diseases account for roughly 5 to 10 percent of unexplained fever in children.

www.reference.com/article/things-considered-unexplained-phenomenon-49159f3cc2f41d57

Some instances of unexplained phenomena include Sailing Stones of Death Valley, spontaneous human combustion, Seneca Guns and the Nasca lines. Investigating these phenomena over several decades to several centuries, researchers continue to document the existence, but not the origins.

www.reference.com/world-view/causes-unexplained-bruising-91e4c2acf89fbce3

Unexplained bruising can be caused by aspirin or blood thinners, infections that cause toxins to accumulate in blood, hemophilia, von Willebrand's disease, lupus and liver disease, according to WebMD. Certain types of cancer, including Hodgkin's disease, multiple myeloma and leukemia can also cause

www.reference.com/article/possible-causes-unexplained-weight-gain-3bd6ff91f312fb1e

Causes of unexplained weight gain include hormonal changes, pregnancy, fluid retention and menstruation, states Healthline. Certain medications, including birth control pills, and underlying conditions, such as Cushing syndrome, may cause unintended weight gain as well. The condition may be seasonal

www.reference.com/world-view/possible-causes-unexplained-muscle-soreness-fc8414309eb89fe

Chronic fatigue syndrome and hypothyroidism are two conditions that cause muscle soreness not related to trauma or other explanations, notes Mayo Clinic. People with chronic fatigue syndrome may experience other symptoms, such as memory loss, sore throat and headaches, while those with hypothyroidis

www.reference.com/article/possible-causes-unexplained-bruising-1ec9155064d3f7fc

There can be many causes for unexplained bruising, including liver disease, clotting disorders or some cancers, according to WebMD. Unexplained bruises may also be a side effect of certain medications or dietary supplements.

www.reference.com/world-view/blood-disorders-cause-unexplained-bruising-adabe89630b82915

Some blood disorders that cause easy or unexplained bruising include leukemia, factor X deficiency, idiopathic thrombocytopenic purpura, hemophilia and acquired platelet function disorder, according to Healthline. Unexplained or easy bruising is the result of small capillaries just under the skin br