Is it possible to have shingles without a rash?

It's possible: Shingles is also called herpes zoster; without rash, it has its own Latin name "zoster sine herpete". It's uncommon, but possible if localized skin pain on only one side of the body. See a doctor ASAP to confirm the diagnosis and maybe start treatment. Even without rash, prompt anti-herpes Rx (e.g., valacyclovir, famciclovir) is important to speed improvement and help prevent later nerve pain.

Shingles: While painful blisters on the skin are the most common symptoms of a shingles outbreak, there are other symptoms you can use to diagnose the condition. Not all patients suffering from shingles will develop a rash. Pain unilateral in a nerve ending distribution may be accompanied by flu-like symptoms. It should be treated aggressively to prevent post-herpetic neuralgia.

No: Not if you are talking about skin issues. It is possible for the infection to involve the eye but not the skin but this is rare, .