If your chills do not coincide with a fever, it may mean you have one of the following conditions:
Prescription drugs: Chills can be a side effect of prescription drugs, if the prescription is incorrect or an individual is using them in an abusive manner. These chills will be in periodical sessions, where you are besieged with uncontrollable muscle spasms. These chills will be accompanied by nausea and vomiting, allergic reactions, drowsiness, insomnia, heart problems, and dependence.
Bladder Infection or Cystitis: Bladder infections are a quite common occurrence in women, with around 20% of all women developing at least one bladder infection at some time in their lives. Men can also develop a bladder infection, though it is rare. A bladder infection will not always result in chills, as it is a secondary symptom. But if your chills accompany a burning sensation while urinating, increased frequency of urination, and strong smelling urine, then you may have a bladder infection. If you experience these symptoms, contact your doctor immediately as they could indicate a life threatening kidney disease, a bladder or kidney tumor, a prostate infection , or a urinary tract stone.
Anemia: This occurs when the body has low hemoglobin levels - a protein that is found in red blood cells. A common symptom of this condition is chills without a fever. Accompanying symptoms include pale complexion, fatigue, chest pain, dizziness, shortness of breath, and headaches. If your chills coincide with a few or all of the above symptoms then you may have anemia.
Malnutrition: This occurs when your body is not getting sufficient nutrients. There is a wide range of causes for malnutrition, but the three main ones are poor diet, problems with absorption and digestion, and auxiliary medical conditions. The symptoms will fluctuate in accordance to the underlying cause of malnutrition. Chills without fever, fatigue, dizziness, and weight loss are the general symptoms that seem to be present in the majority of the cases. If your chills are followed by these symptoms, you may need to be treated for malnutrition. Treatment involves replacing the missing nutrients, or fixing the underlying medical condition that causes the malnutrition.
Hypothyroidism: The thyroid is a small gland located in a person's neck. Its chief function is to release hormones that regulate your metabolism. Hypothyroidism occurs when the thyroid is not producing enough thyroid hormone. This causes many symptoms; one such symptom is the chills without a fever. Chills will result because you are more sensitive to cold due to this condition. The other symptoms include constipation, depression, fatigue, heavy menstruation, joint pain, pale skin, brittle fingernails and hair, weight gain. As the condition progresses, more symptoms will appear, the later symptoms include puffiness in the face, hands, and feet, slow speech, thinning eyebrows, thickening of the skin, and decreased senses.
Hypoglycemia: This is caused by extremely low blood sugar or glucose. Hypoglycemia is not a condition by itself but a symptom of a specific health issue, the prominent one being diabetes. The symptoms that will coincide with hypoglycemia are chills, confusion, double or blurred vision, heart palpitations, anxiety, sweating, hunger, and a tingling sensation around your mouth.
Spider Bite: Spider bites are normally a harmless nuance, but if they are caused by a black widow or brown recluse spider, serious symptoms can occur. Both spiders will cause similar symptoms. These include chills, which are rarely accompanied by a fever, muscle spasms, vomiting and nausea, headache, abdominal pain, a rash, and joint stiffness. However, they do differ in accordance with the appearance of the spider bite. The brown recluse will produce a bite site that is surrounded by a purplish/bluish rash, encompassed by a white ring that is further outlined in a red line. In the middle of this ring formation there should be a blister that is filled with liquid. The black widow will produce a bite that is red and has two visible fang marks. Treatment can be restricted to over the counter medication and home remedies, unless you develop a severe allergic reaction. If this occurs you must seek immediate medical intervention.