Feeling cold and tired: what to know

Cold intolerance means feeling unusually cold or needing more layers than people around you. Tiredness may be physical fatigue, sleepiness, or reduced concentration. Together, they can occur with anaemia, including iron deficiency anaemia, or an underactive thyroid. Poor sleep, emotional strain, reduced food intake, infection, and some medicines can also leave you chilled and drained. The pattern matters: notice when it began, whether it is constant, and whether you have breathlessness, paleness, constipation, dry skin, weight change, heavy periods, or numb hands and feet.

Keep warm with comfortable layers, eat regular nourishing meals, drink fluids, and allow time for restorative sleep. Keep a brief symptom record, including menstrual bleeding, dietary changes, recent illness, and medicines or supplements. Do not start iron or thyroid treatment without advice, because the right treatment depends on the cause and excess supplements can be harmful. A clinician may review your history and examine you, then consider blood tests for blood count, iron stores, and thyroid function. Read more about [Anaemia](/conditions/anaemia/), [Iron Deficiency Anaemia](/conditions/iron-deficiency-anaemia/), and [Hypothyroidism](/conditions/hypothyroidism/).

Arrange a medical appointment if symptoms last, interfere with daily activities, or return repeatedly. Seek urgent help for chest pain, severe breathlessness, fainting, confusion, new weakness, or very heavy bleeding. If cold sensitivity is your main concern, the [Cold Intolerance](/symptoms/cold-intolerance/) page may help you describe it. Treatment such as [Thyroid Hormone Replacement](/treatments/medical-management/thyroid-hormone-replacement/) is used only when testing supports an underactive thyroid.

Could anaemia, iron deficiency, or thyroid changes explain this pattern? Which tests are appropriate? Could my periods, diet, sleep, medicines, or another illness be contributing? What changes should prompt earlier review?