A psoriasis rash progresses to red bumps and silvery-scaled patches, which are often seen on the knees, elbows, or scalp. In contrast, a shingles rash is usually seen on one side of the torso ...

The shingles rash or blisters occur on one side of the body, most commonly the torso but the disease can affect other areas such as the face and scalp. Shingles can be intensely painful and can ...