Hi Mere,
You can approach the problem in many different ways. Here are a few suggestions:
1 ) One of the things your husband's cousin can do for himself now is just tap whenever he feels the anxiety coming on. For example, if he is about to make a trip, he might start feeling anxious or worried about the issue. He can start tapping then.
Then he can tap when he's actually doing the travelling, on any anxious thoughts, and on any physical sensations (as in, needing to use the bathroom).
2 ) Another thing that would be useful to him would be to ask himself how he feels about his condition. Sometimes when we've had a chronic embarrassing problem, we tend to beat ourselves up about it. He can use tapping phrases like the following to feel better about his situation, and to be more forgiving and loving towards himself.
- Even though I've had this problem for 20 years now, and it makes me feel so (frustrated? embarassed? angry?) I love and forgive myself anyway
- Even though nothing I'm doing to help this problem is working, and I feel ready to give up, I love, accept and support myself
- Even if this problem never goes away, I'm willing to forgive and accept myself unconditionally
3 ) Communicating with one's body is also helpful. If the problem has an emotional or mental cause, chances are, his body is trying to tell him something, or pass a message, every time he experiences this problem. So maybe he could ask questions while tapping on himself, for example:
- What is my body trying to tell me every time I feel this need to use the bathroom?
- What beliefs am I holding inside which make me feel this way, every time I travel?
4 ) Perhaps the most useful thing he can do, however, is consider what was going on in his life 20 years ago, which is when you said the problem started. Perhaps he has no conscious recollection of the causing event, but he can use tapping phrases for what he does remember, in the hopes that he will gain more pieces of the puzzle. This can be a bit more complex, however, which is why I've mentioned it last.
I really hope these suggestions help you. You can pick one, or a few to work with, and see how you all go. All the best to you :-)