Which Medical Specialty to Consult for Unexplained Weight Loss?

I'm not sure which department to visit?

Doctor, I have lost about 6 kilograms in the past six months.
I am already quite thin, and gaining weight is not easy for me.
However, my meals are normal, and my bowel movements are regular.
I really can't figure out why my weight keeps decreasing.
I want to go to the hospital for a blood test, but I'm not sure which department to visit.
Could you please advise me? Thank you!

Su Tai Tai, 40~49 year old female. Ask Date: 2008/08/23

Dr. Yang Hongzhi reply Internal Medicine

You can first schedule an appointment with either a family medicine physician or an endocrinologist.

Reply Date: 2008/08/23

More Info

When experiencing unexplained weight loss, especially when you have a normal appetite and regular bowel movements, it is essential to consult a medical professional to determine the underlying cause. In your case, the best course of action would be to see a primary care physician or a family medicine doctor. They can perform an initial assessment, including a thorough medical history and physical examination, to identify any potential issues contributing to your weight loss.

Unexplained weight loss can be a symptom of various medical conditions, ranging from benign to serious. Some common causes include:
1. Thyroid Disorders: Conditions such as hyperthyroidism can lead to increased metabolism, resulting in weight loss despite normal eating habits. A simple blood test measuring thyroid hormone levels can help diagnose this.

2. Gastrointestinal Issues: Disorders affecting the digestive system, such as celiac disease, Crohn's disease, or ulcers, can impair nutrient absorption, leading to weight loss. Your doctor may recommend tests such as endoscopy or imaging studies if they suspect gastrointestinal problems.

3. Diabetes: Uncontrolled diabetes can lead to weight loss due to the body’s inability to utilize glucose effectively. Blood tests measuring glucose levels and HbA1c can help diagnose diabetes.

4. Mental Health Conditions: Conditions such as depression or anxiety can affect appetite and lead to weight loss. If you have been feeling down or anxious, discussing this with your doctor is crucial.

5. Cancer: Although it is a less common cause, unexplained weight loss can sometimes indicate malignancies. Your doctor may recommend imaging studies or referrals to specialists if they suspect cancer.

6. Chronic Infections: Conditions like tuberculosis or HIV can also lead to weight loss. Blood tests and other diagnostic procedures can help identify these infections.

7. Medications: Certain medications can cause weight loss as a side effect. If you are taking any medications, it is essential to discuss this with your doctor.

Once you see your primary care physician, they may order blood tests, imaging studies, or refer you to a specialist, such as an endocrinologist, gastroenterologist, or psychiatrist, depending on the findings.
In addition to consulting a physician, it may be beneficial to keep a food diary to track your daily intake and any changes in your eating habits. This information can provide valuable insights for your healthcare provider.

In summary, unexplained weight loss should not be ignored, and consulting a primary care physician is the first step in addressing your concerns. They will guide you through the necessary evaluations and help determine the appropriate course of action based on your individual health needs. Remember, early intervention can lead to better outcomes, so seeking medical advice promptly is crucial.

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