Hypocalcemia: This condition, characterized by low calcium levels in the blood, can cause tingling sensations in the extremities, among other symptoms like muscle cramps and chills, due to its effect on nerve function and muscle contraction.

Hypothyroidism: This condition can lead to neurological symptoms including tingling in the extremities, and systemic symptoms like chills due to decreased metabolism.
Vitamin B12 Deficiency: A deficiency in vitamin B12 can cause neurological symptoms such as tingling in the hands and feet, and systemic symptoms including chills, due to its crucial role in the production of red blood cells and maintenance of the nervous system.
Anemia: Certain types of anemia, especially those causing a significant reduction in red blood cell count or hemoglobin, can lead to symptoms like chills and tingling in the extremities due to inadequate oxygen delivery to tissues.

Multiple Sclerosis (MS): An autoimmune disease affecting the brain and spinal cord, MS can cause a wide range of neurological symptoms including tingling sensations. While less likely to cause systemic chills directly, the diagnosis of MS is critical due to its significant impact on quality of life and the availability of disease-modifying treatments.
Guillain-Barré Syndrome: A rare autoimmune disorder where the body's immune system mistakenly attacks part of its peripheral nervous system, leading to tingling sensations and potentially life-threatening paralysis. Chills could be present if the condition is preceded by an infection.
Lyme Disease: Caused by the bacterium Borrelia burgdorferi, transmitted to humans through the bite of infected black-legged ticks, Lyme disease can cause neurological symptoms including tingling and systemic symptoms like chills, especially in its early stages.

Sarcoidosis: A disease characterized by the growth of tiny collections of inflammatory cells (granulomas) in any part of the body, sarcoidosis can rarely cause neurological symptoms including tingling, and systemic symptoms like chills, due to its potential to affect any organ system.
Heavy Metal Poisoning (e.g., Lead, Mercury): Exposure to certain heavy metals can lead to neurological symptoms including tingling in the extremities. Systemic symptoms like chills might be less common but could occur depending on the metal and the level of exposure.
Peripheral Artery Disease (PAD): While more commonly associated with claudication (pain in the legs during exercise), in rare cases, PAD could lead to tingling sensations in the extremities due to reduced blood flow. Chills might be present in cases of severe ischemia or if there's an accompanying infection.