The 'tingling' and 'warmth' sensations seem to be relativity localized and subdermal. Absent any visually-detected skin changes in coloration, an underlying causation might be circulatory.
If the tingling and warmth sensations were remarkable in the lower extremities, such as the feet and ankles, there might be an underlying causation such as early diabetes.
Given the fact that most of the tingling and warmth sensations appear to be localized and subdermal, I would not rule out the possible indicators of early diabetes.
Is there a family history of diabetes? Have you had any recent noticable skin sores or lesions that did not heal normally? Anything unusual about your urination frequency, color, and smell? Are you drinking more fluids than usual to quench your thirst?
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