Feeling cold when others are comfortable is common and usually has an identifiable cause, ranging from normal individual differences to treatable medical conditions.
Common, often harmless causes:
1. Lower body weight / less body fat: Body fat provides insulation, so people with less of it often feel colder.
2. Lower muscle mass: Muscle generates heat. People with less muscle (and women on average, who tend to have less muscle mass) often feel colder.
3. Being female: Women tend to feel colder than men due to differences in muscle mass, body fat distribution, and hormones. Studies even show women's hands tend to be colder.
4. Poor circulation: If blood flow to extremities is reduced, hands and feet feel cold even when you're otherwise warm.
5. Low calorie intake or dieting: Eating too little slows metabolism and reduces heat production.
6. Dehydration: Affects your body's ability to regulate temperature.
Medical causes worth checking:
1. Hypothyroidism (underactive thyroid): One of the most common medical causes of feeling cold all the time. The thyroid regulates metabolism and body temperature. Often comes with fatigue, weight gain, dry skin, and hair changes.
2. Anemia (low iron or low red blood cells): Reduces oxygen delivery and is a very common cause of feeling cold, especially in women. Often comes with fatigue and pale skin.
3. Poor circulation conditions: Including Raynaud's phenomenon (where fingers and toes turn white/blue and feel cold in response to cold or stress).
4. Vitamin B12 deficiency: Can cause cold sensations and tingling.
5. Diabetes-related nerve or circulation issues.
When to see a doctor: - The cold feeling is new, persistent, or worsening - It comes with other symptoms: fatigue, weight changes, hair loss, pale skin, dizziness, or numbness/color changes in fingers and toes - It interferes with your daily life - Simple blood tests can check for thyroid problems, anemia, and B12 deficiency — all common and treatable
What can help (for benign causes): - Stay well-fed and hydrated - Build muscle through strength training (more muscle = more heat) - Dress in layers - Stay active to boost circulation - Ensure adequate iron and B12 in your diet
The takeaway: Always feeling cold is often due to body composition, being female, or poor circulation — but it can also signal treatable conditions like an underactive thyroid or anemia, especially if it's new or comes with other symptoms. A simple blood test can identify these common causes, so it's worth checking with a doctor if the feeling is persistent or new.