Which of these do people actually confuse?
Nine conditions overlap in this space, which makes 36 possible pairs. Most sites pick the pairs that suit their product. We measured all 36 against 7,205,554 patient comments and wrote about the ones people genuinely discuss together.
How we decided which pages to write
We counted comments mentioning both conditions across 18 patient subreddits, then wrote pages only for pairs above 2,000 co-mentions. The threshold was set after seeing all 36 counts, not before. Every count and every query is published below, including for the pairs we skipped.
Pairs we wrote about
| Pair | Comments discussing both | Share of the smaller topic | Status |
|---|---|---|---|
| IBS or SIBO? | 16,408 | 8.8% | Written |
| SIBO and Candida | 15,014 | 14.3% | Not written yet |
| MCAS and Long COVID gut | 9,693 | 4.9% | Not written yet |
| MCAS and POTS / dysautonomia | 8,976 | 11.4% | Not written yet |
| MCAS and Histamine intolerance | 8,253 | 24.3% | Not written yet |
| Long COVID gut and POTS / dysautonomia | 7,177 | 9.1% | Not written yet |
| SIBO and MCAS | 6,296 | 3.1% | Not written yet |
| SIBO and Histamine intolerance | 5,086 | 15.0% | Not written yet |
| MCAS and Toxic mold / CIRS | 3,167 | 11.8% | Not written yet |
| MCAS and Food allergy / intolerance | 2,863 | 6.9% | Not written yet |
| SIBO and Food allergy / intolerance | 2,409 | 5.8% | Not written yet |
| IBS and MCAS | 2,387 | 1.3% | Not written yet |
| IBS and Food allergy / intolerance | 2,063 | 5.0% | Not written yet |
Pairs we did not write about, and their numbers
These 23 pairs fell below the threshold. That does not mean the conditions are unrelated. It means we could not find enough patients discussing them together to justify a page, and we would rather say so than publish a page built on an assumption.
| Pair | Comments discussing both |
|---|---|
| SIBO and Long COVID gut | 1,856 |
| SIBO and Toxic mold / CIRS | 1,676 |
| IBS and Candida | 1,603 |
| Histamine intolerance and Long COVID gut | 1,597 |
| MCAS and Candida | 1,415 |
| Candida and Toxic mold / CIRS | 1,233 |
| IBS and Histamine intolerance | 1,176 |
| Histamine intolerance and Candida | 1,052 |
| Histamine intolerance and Food allergy / intolerance | 1,026 |
| SIBO and POTS / dysautonomia | 1,000 |
| IBS and Long COVID gut | 952 |
| Long COVID gut and Candida | 890 |
| IBS and POTS / dysautonomia | 787 |
| Long COVID gut and Toxic mold / CIRS | 779 |
| Histamine intolerance and POTS / dysautonomia | 721 |
| Candida and Food allergy / intolerance | 719 |
| Long COVID gut and Food allergy / intolerance | 634 |
| Histamine intolerance and Toxic mold / CIRS | 631 |
| POTS / dysautonomia and Food allergy / intolerance | 302 |
| Food allergy / intolerance and Toxic mold / CIRS | 240 |
| POTS / dysautonomia and Toxic mold / CIRS | 237 |
| IBS and Toxic mold / CIRS | 194 |
| POTS / dysautonomia and Candida | 151 |
Every query behind these 36 numbers is published on the corpus page, along with the term lists, the limitations, and what a Reddit-derived count cannot tell you about the general population.