Diabetic Neuropathy: When blood sugar levels remain uncontrolled for a long time, it damages the nerves. This causes numbness and pain that starts in the feet and then spreads to the hands.
Nutritional Deficiency: Deficiency of vitamins B12, B1, and B6, which are essential for the functioning of the nervous system, is a major factor causing numbness.
Spine Issues: Degeneration of the discs in the spine (Slipped Disc/Cervical or Lumbar Spondylosis) can compress the nerves, causing pain and numbness in the hands or feet.
Circulatory Impairment: A condition in which blood flow to the hands and feet is reduced (PAD) can cause the muscles to not get enough oxygen, which can cause pain and numbness.
Alcohol: Excessive alcohol consumption can affect the nerves and cause numbness.
Thyroid problems: Thyroid disorders such as hypothyroidism can also cause this type of rash in some people.
Side effects of medications: Rashes can be experienced as a side effect when using certain types of medications (e.g. chemotherapy drugs).