This topic is about dealing with a persistent open sore located on the underside of the stoma shaft. The person experiencing this issue has tried using the stoma powder "crusting" technique for two months without seeing any improvement. They are seeking effective methods or products to help heal the sore. Here are some suggestions and insights that might be helpful:

1. Consider using Anasept wound gel along with the powder-crusting technique and a Duoderm skin patch.

2. Try a 50-50 soak of white vinegar and distilled water.

3. Since the sore is on the stoma shaft itself, accessing and drying it can be challenging. The surrounding peristomal skin is in good condition, but minor seepage might be hindering healing.

4. Calamine lotion can be applied to the cleaned and dried area. Allow it to dry completely before applying stoma powder and wafer.

5. Milk of Magnesia can be dabbed on clean, dry skin. Let it dry, then apply the wafer. You might want to switch to a different adhesive ring or wafer glue and increase the frequency of wafer changes to prevent acidic output from reaching the sore.

6. Nystatin cream can be applied in a thin layer on the sore, followed by the powder-crusting method.

7. Anasept Wound Gel can be gently rubbed into cleaned skin, wiped completely dry, and then a barrier wipe or spray can be applied before attaching a SenSura Mio pouch without an additional seal. This has been reported to clear skin issues quickly.

8. During appliance changes, leave the area uncovered as long as possible to allow air exposure. Use a hair-dryer on a low-warm setting to keep air moving over the sore.

9. For vinegar/distilled-water soaks, place a woven gauze pad soaked in a 50-50 solution of white vinegar (5% acetic acid) and distilled water on the sore for 10 minutes, then let the skin air-dry before applying the appliance.

10. Silver sulfadiazine 1% cream, prescribed by a dermatologist, can be used after vinegar soaks and has been reported to work wonders for deep ulcerations.

11. For an antiseptic and antifungal regimen, clean the peristomal skin in the shower with Hibiclens (chlorhexidine) for two or three consecutive changes. Apply a very light dusting of 2% miconazole-nitrate antifungal powder, then dab thoroughly with skin-prep before placing the appliance.

12. Make sure the wafer opening is not cut too tight; enlarge it slightly to prevent the edge from rubbing the stoma shaft.

13. Inspect barrier rings immediately after removal. Shiny spots indicate weeping or leakage; if found, change more frequently.

14. If you are physically active, ensure that movement or external pressure is not shifting the appliance and abrading the stoma.

15. If the sore is deeper than a superficial irritation or shows no improvement, consult a colorectal surgeon or wound/ostomy nurse for further advice.