**Jaundice** is due to external causes.

**Explanation:**

Jaundice is a medical condition characterized by yellowing of the skin and eyes, caused by an increased level of bilirubin in the blood. Bilirubin is a yellow pigment that is produced when red blood cells break down. Normally, the liver processes bilirubin and excretes it through bile into the intestines. However, certain external factors can disrupt the normal functioning of the liver, leading to jaundice. These external causes include:

1. **Viral hepatitis**: Viral hepatitis is a common cause of jaundice. Hepatitis A, B, C, D, and E are viral infections that affect the liver and can lead to inflammation and dysfunction. These viruses are usually transmitted through contaminated food or water, blood transfusions, or sexual contact.

2. **Alcohol abuse**: Excessive consumption of alcohol can cause liver damage and lead to a condition known as alcoholic hepatitis. This inflammation of the liver can impair its ability to process bilirubin, resulting in jaundice.

3. **Drug-induced liver injury**: Certain medications, such as acetaminophen, nonsteroidal anti-inflammatory drugs (NSAIDs), statins, and antibiotics, can cause liver damage and impair its function. This can result in jaundice as the liver is unable to process bilirubin effectively.

4. **Autoimmune hepatitis**: In autoimmune hepatitis, the body's immune system mistakenly attacks the liver, causing inflammation and damage. This can disrupt the liver's normal functioning and lead to jaundice.

5. **Toxic liver injury**: Exposure to certain toxins, such as industrial chemicals, solvents, and pesticides, can cause liver damage and impair its ability to process bilirubin. This can result in jaundice.

It is important to note that while external factors can contribute to the development of jaundice, there are also several internal causes, such as liver diseases, gallstones, and genetic disorders, that can lead to the condition. Therefore, it is essential to identify the underlying cause of jaundice through proper medical evaluation and diagnosis in order to determine the appropriate treatment approach.