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What causes constipation and loss of appetite? 17 possible conditions

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



The thyroid gland produces a hormone that controls how your cells use energy (metabolize). Hypothyroidism occurs when the body doesn't produce enough. Untreated, it can cause complications like obesity and heart disease.

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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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Depression Overview

Depression is a mood disorder that can cause extreme and persistent feelings of sadness, hopelessness, and worthlessness. Depression type largely determines what kind of medical treatment is best.

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Anorexia Nervosa

Anorexia is an eating disorder in which obsessive worry about body weight and the food you eat can result in severe weight loss. Symptoms include constipation, missed period, and thinning hair.

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

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Irritable Bowel Syndrome

Irritable bowel syndrome (IBS) is a chronic condition that affects the large intestine and causes many uncomfortable symptoms, such as bloating, gas, cramping, diarrhea, constipation, and pain.

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Celiac Disease (Gluten Intolerance)

Celiac disease is a digestive disorder caused by an immune reaction to gluten. Symptoms vary but can include arthritis, fatigue, and abdominal symptoms.

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Crohn’s Disease

Crohn's disease is a chronic bowel disease that causes severe inflammation of the digestive tract. It is associated with abdominal pain, diarrhea, and may affect your quality of life. Crohn's disease is characterized b...

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Hypercalcemia is a condition in which you have too much calcium in your blood. Serious cases could cause symptoms like abdominal pain, nausea, constipation, and weakness.

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Encopresis is also known as fecal soiling. It occurs when a child over the age of 4 years has a bowel movement and soils his or her pants. This behavior is often linked to constipation. Constipation occurs when stoo...

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

Appendicitis is inflammation of the appendix, which can be fatal if left untreated. The telltale sign is pain that usually starts as mild cramping, especially on the right side, and becomes more severe over time.

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Peripheral Neuropathy

Peripheral neuropathy occurs when nerves malfunction because they're damaged or destroyed. You'll notice a tingling, numbness, or weakness, and possibly sweating, constipation, or diarrhea.

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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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Wilms' Tumor

Wilms' tumor is the most common type of kidney cancer in children. It's typically diagnosed around three years of age. Children might display constipation, abdominal pain, fever, and loss of appetite.

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Pituitary Cancer

The pituitary gland is a very small gland of major importance to the functioning of the human body. It is located directly behind the eyes and below the front of the brain. It is about the size of a pea. Despite it...

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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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Acute Appendicitis

Acute appendicitis is a painful inflammation of your appendix, a small sac connected to your large intestine. It is an urgent condition that must be addressed immediately. If you have appendicitis, your appendi...

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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.