These two sites are awful. They literally only display links that they get paid for. And they don't even do a good job with it. In some cases the affiliate links are a worse offer than others publicly available.
Shingles, a viral infection of the nerve roots caused by the chickenpox virus, can sometimes lead to a painful complication called post-herpetic neuralgia. Sometimes, a physical stress like cold or sunburn can bring on an attack. Even clothing touching the skin or a cool breeze can cause excruciating pain.
Years after an episode of chickenpox, VZV can become reactivated, causing shingles. Typically, shingles appears as a painful rash along a band of skin (dermatome) supplied by a single nerve root. Most cases of shingles occur in people over the age of 50.