Shingles can go away on their own. The only reason people seek treatment is because they wish to fasten the healing process. The period after which shingles heal varies from one person to another. In most cases, Shingles last for 3 to 5 weeks. Shingles appear to be following a certain pattern. If you are keen, you will notice the following;
https://curehows.com/rashes/how-long-shingles-last-recovery/