If you have seen a rash on your arm in a dream: If you do not reveal the facts clearly, there may be people who interfere with your work or try to make you look bad. These days, the situations you have to struggle with can motivate you and you can feel good. To see a rash on your arm in a dream reflects existing health problems. This dream also reflects that there is a situation or person that is preventing you from progressing and controlling your affairs.