This topic is about someone who has been successfully irrigating their colostomy every other day since March 2015. However, recently, they've been having trouble getting water to flow into the stoma during irrigation. The water only started flowing after a long wait, and the output was thicker than usual, indicating possible constipation. Despite trying different methods, including fasting and changing equipment, the issue persists. A recent CT scan showed no abnormalities, and the person plans to consult with stoma nurses for further advice. They are also curious if others have faced similar challenges and are seeking advice.

Here are some helpful insights and advice:

1. Possible Causes and First Checks
- Constipation or firm stool might be blocking the water flow. Consider using a mild stool softener like Citrucel. MiraLax is another option but works more slowly.
- A parastomal hernia could be folding over the opening, preventing water from entering. It's best to have this checked by a professional or through careful self-examination.
- In rare cases, water might enter but nothing comes out. If this continues, it's important to consult a surgeon.

2. Mechanical Work-Arounds for a Hernia or Tight Opening
- Gently insert a lubricated finger to dilate the stoma before using the cone.
- Consider replacing the cone with an anal catheter that can reach beyond any obstruction, allowing water to enter the colon.
- If gravity feed is too weak, connect the tubing to a pressurized reservoir, such as:
- A hand-pump garden sprayer with a 3-liter capacity.
- A Braun Medical irrigator pump, which is smaller but more expensive.
- A portable battery-operated camping shower, which is effective but less durable.
- To prevent splash-back, use a rubber washer on the tube to avoid over-insertion and have extra water (around 3 liters) ready to compensate for any loss.
- Use an on/off switch from the Coloplast irrigation system to make tubing changes easier.

3. Procedural Tips
- If the stool is consistently thick, try irrigating daily instead of every other day to maintain moisture.
- When using stool softeners, wear a pouch instead of a cap to manage unexpected output.
- Proceed with caution, as there is a small risk of colon perforation with deep catheter use. It's crucial to get a thorough medical assessment before trying any DIY methods.
- Anal catheters might be harder to find now, but any smooth-ended alternative that fits standard irrigation tubing can work.

4. Resources
- Photos of the catheter-and-pump setup can be found in the forum member’s profile for reference.