I have non-itchy red spots on arms and legs, a couple on belly and side of torso. no fever. fatigue, slightly swollen neck gland, back and head ache.

Non-itchy rashes: are more worrisome. It could come from collagen vascular diseases or sometimes even lymphoma. If it persists more than a few days, you should get medical evaluation.

Diagnosis uncertain: These lesions need to be visualized & a history needs to be obtained in order to make an accurate diagnosis. Sometimes lab testing or biopsy is necessary.