Hypocalcemia: This condition, characterized by low calcium levels in the blood, can cause tingling sensations in the extremities. Chills might accompany if the hypocalcemia is severe enough to cause muscle cramps or tetany, which could indirectly lead to feelings of coldness.

Hypothyroidism: This condition can lead to neurological symptoms including tingling in the extremities due to the metabolic slowdown affecting nerve function. Chills can also be present due to the decreased metabolism affecting the body's ability to regulate temperature.
Anemia: Severe anemia can lead to decreased oxygen delivery to tissues, potentially causing tingling sensations. Chills might be associated with an underlying infection or chronic disease causing the anemia.
Vitamin B12 Deficiency: A deficiency in vitamin B12 can cause neurological symptoms, including tingling in the extremities, due to its role in the synthesis of myelin. Chills might be less directly related but could occur in the context of a broader systemic illness.

Multiple Sclerosis (MS): Although less common, MS is a critical diagnosis not to miss. It can present with tingling sensations in the extremities due to demyelination of nerve fibers. Chills might not be a primary symptom but could occur in the context of an MS relapse or due to associated infections.
Guillain-Barré Syndrome: This is an autoimmune disorder that can cause rapid-onset muscle weakness and tingling in the extremities. Chills could be present if the syndrome is triggered by a recent infection.
Lyme Disease: In its early stages, Lyme disease can cause neurological symptoms, including tingling, and systemic symptoms like chills. It's crucial to consider this diagnosis, especially in individuals with a history of tick exposure.

Heavy Metal Poisoning (e.g., Lead, Mercury): Exposure to certain heavy metals can cause neurological symptoms, including tingling in the extremities. Chills might be part of a broader systemic response to poisoning.
Sarcoidosis: This condition, characterized by the growth of granulomas in various parts of the body, can rarely cause neurological symptoms, including tingling, and systemic symptoms like chills.
Peripheral Artery Disease (PAD): While more commonly associated with claudication, severe PAD could potentially cause tingling in the extremities due to reduced blood flow. Chills might be less directly related but could occur in the context of tissue ischemia.