Complaints & connections · borters.ch
Always feeling cold can point to thyroid, iron or blood pressure — it is a signal, not over-sensitivity.
Also known as: cold intolerance · feeling cold · cold hands and feet
Open in the tool — with search and all the links →This compilation is for information and replaces neither medical diagnosis nor treatment. If you have symptoms, see a doctor.
Constantly feeling cold or a marked sensitivity to cold that others don’t feel. Usually harmless (slim build, cool surroundings, little activity). Medical causes are mainly an underactive thyroid (slowed metabolism), anaemia or iron deficiency — then often with tiredness and pallor. If mainly the hands and feet turn white then blue in the cold, a circulatory reaction (Raynaud’s) can be behind it. A few blood tests clarify the common causes; beyond that, warm layers, movement and eating enough help.
Thyroid, blood count and iron clarify most medical causes.
Several warm layers and regular movement boost heat production.
Too little energy through the day also makes one cold.
For Raynaud’s: warm gloves, avoiding cold and stopping smoking help.
Constantly feeling cold is among the early signs of iron deficiency. Where the bleeding source is missing and there was barefoot walking in warm countries, a rare, treatable explanation exists.
Always feeling cold is one of the latest signs of an underactive thyroid and one of the earliest of iron shortage — which is why both are measured. Basal metabolism falls by about ten to thirty per cent in underactivity, which lowers heat production. After hormone treatment starts, full effect takes six to eight weeks, and feeling cold is among the last things to improve. With underweight it is simply the insulating fat that is missing.
Thyroid hormone works if there is a shortfall — it needs six to eight weeks for full effect, and feeling cold is among the last things to improve. Treatment at normal values does not create warmth but palpitations and bone loss. Iron works with low ferritin even without anaemia, over four to twelve weeks. With underweight the insulation is missing, and no drug replaces it — here weight and muscle help.
A slim build, cool surroundings and little activity make one feel cold.
Fingers turning white in attacks suggest a Raynaud’s reaction.
The raw material of the thyroid hormones. In Switzerland it comes mainly from iodised salt, dairy and sea fish — too little and too much both cause problems, so the middle is the aim.
Needed to convert the storage hormone into the active form and protects the gland from oxidative stress. Brazil nuts, fish and eggs cover the need; not high doses over years without a reason.
The enzyme that builds iodine into the hormone needs iron. An empty iron store can therefore cause complaints that look like an underactive thyroid — and the two often occur together.
Involved in the conversion and in the action of the hormones inside the cell. A lack often shows first in hair and nails — exactly where the thyroid becomes visible too.
Iron deficiency disturbs heat production, even without anaemia — feeling cold constantly is one of the early signs. Ferritin measures it; replaced by finding.
With iodine deficiency the thyroid works more slowly, and feeling cold is one of the first signs. In Switzerland iodised salt usually covers the need — with Hashimoto’s, extra iodine can stoke the inflammation. Measure first.
Needed to convert thyroid hormone into its active form. 100–200 µg a day with a proven deficiency; the gap between need and too much is narrower here than for almost any other nutrient.
The thyroid hormones determine the production of heat in every cell. Feeling cold together with tiredness, dry skin and constipation is the classic picture of an underactive thyroid.
Influences how wide the skin vessels are and thereby how quickly warmth is lost. That explains cold hands across the cycle and in the menopause.
Narrows the vessels in hands and feet with stress and cold. So cold hands under tension are no damage to the circulation but a regulation.
Constant chill often has a measurable cause: iron deficiency, underactive thyroid, or simply too little energy over time. Measure first, then supplement — iron on suspicion can harm.
Iron deficiency is one of the most common and most easily corrected causes of constant chill. Ferritin is measured — below 30 counts as deficiency even with a normal blood count.
Alternating showers train the vessel response. Small studies show better circulation in hands and feet after some weeks — they do not clarify the cause of the chill.