These are common symptoms of diabetes mellitus. Medication side effects are also possible. It's best to check with your doctor if you've been having these symptoms for more than a few days.
While the list below can be considered as a guide to educate yourself about these conditions, this is not a substitute for a diagnosis from a health care provider. There are many other medical conditions that also can be associated with your symptoms and signs. Here are a number of those from MedicineNet:
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Urinary Tract Infection
A urinary tract infection (UTI) is an infection of the bladder, kidneys, ureters, or urethra. E. coli, a type of bacteria that lives in the bowel and near the anus, causes most UTIs. UTI symptoms include pain, abdominal pain, mild fever, urinary urgency and frequency. Treatment involves a course of antibiotics.
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Type 2 Diabetes
Type 2 diabetes is a chronic condition that may be reversible with diet and lifestyle changes. Symptoms include excessive thirst, frequent urination, weight loss, fatigue, and an unusual odor to your urine. Most people don't know they have type 2 diabetes until they have a routine blood test. Treatment options include medications, a type 2 diabetes diet, and other lifestyle changes.
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Dehydration
Dehydration is the excessive loss of body water. There are a number of causes of dehydration including heat exposure, prolonged vigorous exercise, and some diseases of the gastrointestinal tract. Symptoms of dehydration include headache, lightheadedness, constipation, and bad breath. Treatment for dehydration is to replace lost fluids and electrolytes.
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Type 1 Diabetes
Type 1 diabetes mellitus (juvenile) is an auto-immune disease with no known cause at this time, although there are a few risk factors. Symptoms of type 1 diabetes include frequent urination, unintentional weight loss, dry and itchy skin, vision problems, wounds that heal slowly, and excessive thirst. Type 1 diabetes is diagnosed with blood tests. A healthy lifestyle and controlling blood glucose levels can improve life expectancy.
At MedicineNet, we believe it is important to take charge of your health through measures such as a living healthy lifestyle, practicing preventative medicine, following a nutrition plan, and getting regular exercise. Understanding your symptoms and signs and educating yourself about health conditions are also a part of living your healthiest life. The links above will provide you with more detailed information on these medical conditions to help you inform yourself about the causes and available treatments for these conditions.
Overview
What is polydipsia?
Polydipsia is the medical definition of excessive thirst. Excess thirst is an abnormal urge to drink fluids at all times. It’s a reaction to fluid loss in your body. Dry mouth (xerostomia) and the urge to pee often (frequent urination) may go along with it.
Drinking adequate amounts of water is very important because your body needs to stay hydrated to function properly. Everyone gets thirsty from time to time. But with polydipsia, your thirst may last for days, weeks or months. No matter how much you drink, you can never seem to quench your thirst.
If you feel thirsty all the time, or if your extreme thirst has increased or continues after you drink, it may be a sign of diabetes or another serious health condition.
Possible Causes
What causes excessive thirst?
Your body needs a certain amount of water to function properly. If you’re feeling thirsty, you may just need to drink more water. Your body is reacting to lost fluids. Feelings of thirst may be due to:
- Eating spicy or salty foods.
- Drinking too much caffeine or alcohol.
- Exercising and sweating profusely.
- Feeling sick, with symptoms such as fever, diarrhea and vomiting.
- Pregnancy.
- Certain prescription medications.
But excessive thirst may be a sign of certain health conditions, such as diabetes mellitus. Having higher than normal blood sugar levels (hyperglycemia) can cause polydipsia. Hyperglycemia is one of the “big three” signs of diabetes mellitus.
If you have excessive thirst and urination, but you don’t have diabetes mellitus, you may have one of the following conditions:
- Diabetes insipidus: Although they share a name, diabetes insipidus is unrelated to diabetes mellitus. Diabetes insipidus affects your kidneys and the glands and hormones that interact with them. This condition can result in your body producing large amounts of urine.
- Loss of bodily fluids from your bloodstream into your tissues:This can result from medical conditions such as burns, sepsis, kidney failure, liver failure or heart failure.
- Dehydration: If you don’t drink enough water over an extended period, your body can become dehydrated.
- Psychogenic polydipsia: Some psychiatric and mental health disorders, such as anxiety and schizophrenia, can result in compulsive water drinking.
- Low blood potassium (hypokalemia): Hypokalemia is a condition that can occur when you don’t have enough potassium in your blood.
- Cystic disease: Cystic disease is a group of conditions in which cysts develop on or around your kidneys.
What’s causing my excessive thirst at night?
One of the most common reasons for waking up thirsty is you didn’t drink enough water during the day. Your body needs a certain amount of water for your salivary glands to produce enough spit (saliva). If your salivary glands don’t produce enough saliva, it can result in dry mouth. Other potential causes of extreme thirst at night include:
- Medications you’re taking.
- What you eat and drink before bedtime.
- Drinking alcohol before going to bed.
- The temperature in your bedroom.
- Mouth breathing.
- Underlying health conditions.
Care and Treatment
What can I do at home to treat polydipsia?
If you’re thirsty, your body is trying to signal that you need to replace water loss. The best way to treat this condition at home is to drink plenty of liquids. But if your excessive thirst continues, you should get in to see a healthcare provider who can determine the cause and recommend the appropriate treatment.
How can polydipsia be prevented?
Depending on the cause of your condition, you may be able to prevent excessive thirst by drinking more water and other fluids. Avoid drinking caffeine and alcohol.
If you have diabetes and have access to blood glucose testing equipment, you may want to test your blood sugar levels when you’re thirsty. Testing your blood sugar levels can help you determine if your blood sugar levels are too high.
When to Call the Doctor
When should polydipsia be treated by a healthcare provider?
If you have excessive thirst along with the following symptoms, you should see a healthcare provider:
- Drinking lots of fluids hasn’t quenched your thirst after several days.
- Frequent urination.
- Excessive urination (polyuria).
- Blurry vision.
- Fatigue.
- Excessive hunger (polyphagia).
Your provider can help determine what’s causing your polydipsia. They’ll ask you about your symptoms and perform a physical exam. Questions they may ask include:
- How long have you been experiencing excessive thirst?
- Did polydipsia develop suddenly or slowly?
- Does your thirst change throughout the day or stay the same?
- Have you recently changed your diet?
- Has your appetite increased?
- Have you had any unexplained weight loss or weight gain?
- Has your physical activity level changed?
- Have you had any recent burns or other injuries?
- Are you sweating a lot?
- How often are you urinating?
- How much urine are you producing?
Your provider may also request several tests to help determine the cause of your polydipsia. These tests may include:
- Blood glucose test.
- Complete blood count.
- Calcium blood test.
- Sodium blood test.
- Urinalysis.
- Electrolyte panel.
How will a healthcare provider treat polydipsia?
Based on your exam and blood tests, your healthcare provider will recommend treatment for the underlying condition causing polydipsia.
If tests show you have diabetes mellitus, they’ll recommend treatments to control your blood sugar levels. Treatment for diabetes insipidus may include drinking fluids to prevent dehydration. Your provider may refer you to a specialist for more specific treatments.
If your medications are causing polydipsia, your provider may adjust your dosage or change your prescription. Treatment for psychogenic polydipsia may include counseling to help you become more aware of your water consumption.
A note from Cleveland Clinic
It's normal to be thirsty sometimes. Your body may just be telling you it’s time to hydrate. But if you constantly feel thirsty even after drinking a lot of fluids, you may have a more serious health condition. See your healthcare provider to find out what's causing your excessive thirst. They can help determine treatment for whatever’s causing your polydipsia.