Hi Osaima,
1. Lifestyle does have an impact. But it needs to fit in with you - when there are inner conflicts and doubts, the benefit of good posture and good food will be minimal. We have the capacity to compensate for toxins, radiation, physical impact to an extent, when we believe this to be true.

2. Physical damage can have a META-meaning - a learning we needed on the way, I wrote an article about this some time ago: [https://www.meta-healthy.life/accidents-without-any-meaning/|A META-Health view on coincidence and fate] 

3. No, there is not always pain and damage in the repair phase. This depends on the inner resources. Mostly, the more conscious action you take to resolve a conflict and self-heal, the less severe symptoms will show up. Dr Hamer didn't know a lot about inner work yet, and described the responses as automatic reactions upon what happens to us.But as the body aims to help us resolve our problems, if we learn to do that consciously we relieve it of this task...This is not to say that when we do inner work, there will be no symptoms. When energy is released, we feel the change and we honour that and want to be friendly with ourselves.

4. Again, this depends on your evaluation. When you can take a new perspective and don't feel attacked in a similar situation, it won't trigger the skin because you don't need its protection.