There are several possible reasons why your poop may have a mothball-like smell:

1. Diet: Certain foods, such as broccoli and cauliflower, can cause your poop to have a strong, unpleasant smell. In addition, consuming large amounts of protein, such as meat or dairy products, can also cause your poop to have a strong odor.
2. Medications: Some medications, such as those used to treat infections or inflammation, can cause changes in the smell of your poop.
3. Medical conditions: Certain medical conditions, such as inflammatory bowel disease (IBD) or bacterial overgrowth, can cause changes in the smell of your poop.
4. Dehydration: Dehydration can cause your poop to become harder and drier, which can give it a stronger, more unpleasant smell.

If your poop consistently has a strong, unpleasant smell, it is important to consult a healthcare professional for a proper evaluation. In some cases, changes in diet or medication may be necessary to address the issue. If you are experiencing other symptoms such as abdominal pain, diarrhea, or constipation, it is especially important to seek medical attention as these may be signs of a more serious issue.