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What causes back pain and loss of appetite? 23 possible conditions

See a list of possible causes in order from the most common to the least.



Bleeding or spotting, increased need to urinate, tender breasts, fatigue, nausea, and missed period are signs of pregnancy.

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PMS (Premenstrual Syndrome)

PMS symptoms start five to 11 days before menstruation and typically go away once menstruation begins. The cause of PMS is unknown.

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Pelvic Inflammatory Disease (PID)

Pelvic inflammatory disease (PID) is an infection of the reproductive organs in women. It's marked by pain in the abdomen, especially during urination or sex.

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Acute Pancreatitis

Acute pancreatitis is an inflammation in the pancreas, which causes pain and swelling in the upper left side of the abdomen, nausea, and burping.

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In hyperparathyroidism, the parathyroid glands make too much of their hormone. It affects a number of body systems and can cause skin changes, including brittle nails and itching.

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Ankylosing Spondylitis

Ankylosing spondylitis is a form of arthritis that primarily affects your spine. It causes severe inflammation of the vertebrae that might eventually lead to chronic pain and disability.

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Discitis, sometimes spelled diskitis, affects the discs between individual bones of the spine (vertebrae). Swelling in the small spaces between these bones (the intervertebral disc spaces) puts pressure on the discs an...

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Pyelonephritis is an inflammation of the kidney and upper urinary tract. Symptoms include flushed skin, back pain, fever, and nausea.

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Ectopic Pregnancy

This condition is considered a medical emergency. Urgent care may be required.

Ectopic pregnancies occur when a fertilized egg fails to attach to the uterus. In most ectopic pregnancies, the egg will attach to the fallopian tubes. Less common, it may also attach to the abdominal cavity or cervix...

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Teenage Pregnancy

Teenage pregnancy is pregnancy in a woman 19 years of age or younger. A woman can get pregnant if she has vaginal sex with a man at any age after she has started having regular monthly periods. Some signs of pregnanc...

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Gallstones are hard deposits in the gallbladder that can eventually block the exiting bile ducts. Abdominal pain, fever, itchy skin, and jaundice are symptoms.

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Dissection of the Aorta

This condition is considered a medical emergency. Urgent care may be required.

The aorta is a large artery that carries blood out of your heart. If you experience a dissection of the aorta, it means that blood has entered the wall of the artery, between the inner and middle layers. This can happe...

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Abdominal Aortic Aneurysm

This condition is considered a medical emergency. Urgent care may be required.

The aorta carries blood from your heart down to your abdomen, legs, and pelvis. Swollen aortic walls in the abdomen is known as an abdominal aortic aneurysm.

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Ovarian Cancer

The ovaries are small, almond-shaped organs located on either side of the uterus that produce eggs. As the disease progresses, symptoms include back pain and indigestion.

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Lung Cancer Overview

Lung cancer is a cancer that originates in the lungs. Lung cancer often goes undetected in the early stages, since symptoms don't usually present themselves until the advanced stages of the disease.

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Liver Cancer

Liver cancer causes destruction of liver cells and interferes with the ability of the liver to function normally. Cancer that originates in the liver can spread from the liver to other parts of the body.

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Typhus fevers are caused by a bacteria that is transmitted by bites from fleas, ticks, mites, and other arthropods. Rash is a common symptom of typhus.

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West Nile Virus Infection (West Nile Fever)

Spread by mosquitos, West Nile virus symptoms can vary in severity. Diarrhea and abdominal pain usually appears within two weeks of infection.

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Chronic Pancreatitis

Chronic, or long-term, pancreatitis is an inflammation of your pancreas that impairs your body's ability to digest food and regulate blood sugar.

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Brucellosis is a rare disease usually spread through ingesting infected raw meat and unpasteurized milk. Back pain, lethargy, chills, and fever may occur and could lead to complications.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.