Good evening every now and again, i get patches on my skin which are tender and sore. it feels as if i got burnt, its random & usually when i wake up the following morning its gone. its usually a spot on my thighs, legs, feet or butt?

Tender areas: Tender areas on various parts of the body are characteristic of fibromyalgia but generalized aches are also a feature. Another disorder called chronic myofascial pain, which is actually a muscle disorder, is somewhat similar in tender spots. This disorder is felt to be from tension, overuse of muscles,work activities or poor posture. A rheumatologist can evaluate you and advise you best