Why does my poop smell like weed?

Poop that smells like weed can happen when plant chemicals called terpenes—found in cannabis and some foods—pass through your digestive system and alter your gut's natural odor. Cannabis use, certain diets, and changes in gut bacteria can all contribute to this distinct smell.

Common causes include:

• Recent cannabis consumption (smoked or edible)
• High intake of herbs, spices, or leafy greens rich in terpenes
• Shifts in gut microbiome balance
• Slower digestion, which concentrates aromatic compounds

While an occasional weed-like smell is usually harmless, persistent unusual odors—especially with pain, diarrhea, or blood in stool—can signal a digestive issue worth investigating. Because stool odor is influenced by diet, medications, and underlying health conditions, guessing the cause can leave you worried or overlooking something important. A free, instant, online symptom check can help you understand what's driving the change and guide your next steps—whether that's a simple diet tweak or a conversation with your doctor.

Reviewed for medical accuracy: 07/15/2026