Constipation is having less than three bowel movements a week, causing hard stools, abdominal pain and more. However, these illnesses share some symptoms, including: A person who has the flu may experience additional symptoms, such as: Certain viruses cause inflammation within the gastrointestinal (GI) tract, which includes the stomach and small intestine. Sleep deprivation occurs when the lack of restful sleep is severe enough to compromise basic body functions. It’s one of the hardest things; I see you. Hyperparathyroidism can cause fatigue and weakness, increased thirst, impaired thinking, and bone fractures. Some other signs of fatigue include feeling: Loss of appetite means you don’t have the same desire to eat as you used to. Lactose intolerance, or the inability to digest lactose, leads to gas, bloating, and other symptoms. People with eating disorders have extreme and dangerous eating habits. It is often temporary due to factors such as infections or digestive issues, in which case appetite will come back when a person has recovered. Abdominal Pain and Unintentional Weight Loss, Zara Risoldi Cochrane, Pharm.D., M.S., FASCP, Dear Men: Here Are 9 Things You Need to Get Checked, Why ‘Fine’ Isn’t a Feeling, and Why You Should Care, The Best 12 Healthy Eating Books of the Year, as though you have less stamina or endurance than normal, blood tests to search for potential conditions, like hypothyroidism, celiac disease, or HIV, a CT scan or ultrasound scan of the stomach, an EKG or stress test for suspected cardiac involvement, gastric emptying test, which can diagnose delayed gastric emptying, creating a schedule for activity and rest, low-dose corticosteroids to increase appetite, sleeping pills to help you sleep better at night, physical therapy to slowly increase exercise, antidepressants or antianxiety medications, for depression or anxiety, anti-nausea medications like Zofran for nausea caused by medical treatments. When presented with a disease profile of fatigue, loss of appetite, weight loss and depression, most of my colleagues and I can agree that it would be easier to determine what came first, "the chicken or the egg" rather than to figure out the hundreds of underlying possibilities that could be at play with a cluster of non-specific findings like that. Myelodysplastic syndromes are diseases that affect the bone marrow and blood, causing anemia and tiredness. Gentle exercise, such as a short walk, may sometimes increase appetite as well. Methamphetamine use causes increased blood pressure, rapid heart rate, enlarged pupils, sweating, and more. What causes fatigue and loss of appetite? Rectal cancer appears in the rectum and causes bloody stool and constipation. In most cases, appetite loss and tiredness are the result of a minor illness or a change to a person’s diet or sleep routine. Sarcoidosis is a rare disease that can cause swelling and hard lumps in the lymph nodes and organs. ... Tiredness and concentration – tiredness can cause people with dementia to not eat or give up partway through a meal. Radiation sickness is caused by a high dose of radiation, and causes vomiting, diarrhea, hair loss, and more. A drug allergy is an allergic reaction to a medication and can cause a rapid heartbeat and difficulty breathing. Some studies suggest increased age as a risk factor for fatigue. Different viruses are responsible for colds and the flu. ©2005-2019 WebMD LLC. Dementia resulting from a head injury may cause memory problems, difficulty speaking, and personality changes. Osteomyelitis (bone infection) Osteomyelitis is an infection of a bone that causes pain, swelling, and redness. Using drugs recreationally, such as cocaine, cannabis, and amphetamines can also cause a loss of appetite. Mononucleosis is a viral infection causing extreme fatigue, sore throat, fever, rash, muscle aches, and more. The symptoms of gastrointestinal bleeding include black or bloody stool or vomit, dizziness, and cramping. How to Treat Childhood Skin Problems. ©2005-2019 WebMD LLC. A person should see a doctor if their symptoms persist despite beneficial changes to their diet or sleep routine. Malnutrition occurs when the body isn't getting enough nutrients; sometimes the condition is life-threatening. A person who experiences symptoms of Crohn’s disease should see their doctor for a diagnosis and treatment to help manage the condition. Gastritis is an inflammation of the stomach lining, causes stomach upset, irritation, and pain. Throat cancer can cause symptoms including difficulty swallowing, hoarseness, and chronic cough. Breathing in high levels of radon over time can cause lung cancer. What's That Rash? The doctor may recommend lowering the dosage of the medication or switching to an alternative. Track your pain levels, triggers, and treatments. Certain medications have side effects like nausea and drowsiness. Dehydration, or not getting enough fluid, causes low blood pressure, weakness, dizziness, fatigue, and nausea. For example, they may recommend: Ask your doctor for more information about your specific diagnosis and treatment options. Bird flu is spread to people from birds and causes fever, cough, sore throat and muscle aches. A person’s appetite usually returns when they start to recover. See additional information. For expert advice on how to eat healthier and get the nutrients you need, check out these top healthy eating books. ©2005-2015 WebMD, LLC. Symptoms include fever, fatigue, yellowing of the skin, and more. According to the Centers for Disease Control and Prevention (CDC), fibromyalgia affects about 4 million adults in the United States. Typhoid fever is a life-threatening illness and causes fever, general aches and pains, headache, and weakness. Supraventricular tachycardia is fast heart rhythm starting in one of the upper chambers of the heart. Depending on its location, Crohn's disease symptoms can vary. Complications may be life-threatening, but treatment can…, © 2004-2020 Healthline Media UK Ltd, Brighton, UK, a Red Ventures Company. Symptoms of drug dependence and abuse include bloodshot eyes, frequent nosebleeds, drowsiness, and more. Loss of appetite happens when you lose the desire to eat at your typical mealtimes. Pulmonary hypertension can cause shortness of breath, a fast heart rate, or lightheadedness. Intestinal obstruction is when the intestine is blocked and causes pain, swelling, nausea, diarrhea, and more. THE coronavirus symptoms list is “inadequate” and must be expanded to include loss of appetite, feeling hot and extreme tiredness, a top scientist has … Colon cancer is often asymptomatic, but it can cause constipation, bowel obstruction, bloody stool and more. Emphysema is a chronic lung condition that causes shortness of breath, a chronic cough, wheezing, and more. Treatment options are available to help manage the condition. Being underweight means weighing less than you need for good health. As a result, other symptoms may include fainting, chest pain, an irregular or racing heartbeat, blurry vision, dizziness, confusion, difficulty tolerating cold temperatures, and sudden weight loss. Non-small cell lung cancer is the most common type of lung cancer and can cause a cough, chest pain, and more. Mononucleosis is a viral infection causing extreme fatigue, sore throat, fever, rash, muscle aches, and more. Fatigue and loss of appetite are symptoms of several health conditions. Our pill identification tool will display pictures that you can compare to your pill. Chronic kidney disease is a condition of the kidneys that can cause high blood pressure, fatigue, and weakness. Signs of decreased appetite include not wanting to eat, unintentional weight loss, and not feeling hungry. Loss of appetite can be related to lowered immune system function, feeling unwell, and having an upset stomach. People who develop gastroenteritis may experience fatigue and a loss of appetite. What's Causing My Loss of Appetite and Nausea? Debra Sullivan, Ph.D., MSN, R.N., CNE, COI, symptoms of dehydration, such as low urine output, dry mouth, increased thirst, lethargy, and dizziness, the inability to eat or drink for more than 12 hours, changes to your medication routine, if your loss of appetite and nausea are related to certain medications that you take, starting an intravenous (IV) line to replenish your fluids if your symptoms are linked to dehydration, surgery or blood thinning medications if your symptoms are caused by a heart attack or stroke.