Using 'Estoy caliente' instead of 'Tengo fiebre'
Mistake: “Saying 'Estoy caliente' to mean you feel hot from a fever.”
Correction: Tengo calor (I feel hot due to weather) OR Tengo fiebre (I have a fever).
How to say
I have a fever
in SpanishTengo fiebre
TEHN-goh FYEH-breh
The standard, most common way to say you have a fever in any Spanish-speaking country. It literally translates to 'I have fever'.
When you have a temperature, you say 'Tengo fiebre' (I have a fever).
🎬Watch & Learn
I have a fever — in Spanish
💬Other Ways to Say It
Tengo calentura
★★★★☆
TEHN-goh kah-len-TOO-rah
informal🇲🇽 🌍 🇨🇴
A very common way to say 'I have a fever' in Mexico and parts of Central/South America. However, use with caution: in other regions, 'calentura' can mean sexual arousal.
When to use: Use in Mexico or with family/friends in appropriate regions. Avoid in formal settings or regions where you aren't sure of the slang.
Estoy con fiebre
★★★☆☆
ehs-TOY kohn FYEH-breh
neutral🌍 🇪🇸
Literally 'I am with fever.' It emphasizes your current state or condition right now.
When to use: Interchangeable with 'Tengo fiebre', often used when describing your current symptoms to a doctor or boss.
Tengo temperatura
★★★☆☆
TEHN-goh tem-peh-rah-TOO-rah
neutral/informal🇲🇽 🌍
Literally 'I have temperature.' While everyone has a body temperature, this is used euphemistically to mean a *high* temperature.
When to use: Common in casual conversation when you want to sound slightly less clinical.
Tengo unas décimas
★★★★☆
TEHN-goh OO-nas DEH-see-mas
neutral🇪🇸 🇦🇷 🇺🇾
Refers to 'tenths' of a degree. Used when you have a low-grade fever (e.g., 37.2°C to 37.5°C) but not a full-blown high fever.
When to use: Use when you feel slightly unwell or warm, but aren't fully sick yet.
Me siento afiebrado
★★☆☆☆
meh SYEN-toh ah-fyeh-BRAH-doh
neutral🌎
Means 'I feel feverish.' Used when you haven't measured your temperature yet but feel the symptoms.
When to use: Use when describing how you feel rather than stating a medical fact. (Change to 'afiebrada' if you identify as female).
Estoy ardiendo
★★★☆☆
ehs-TOY ar-DYEN-doh
casual/dramatic🌍
Literally 'I am burning.' Used to express a very high fever where you feel extremely hot.
When to use: Use to emphasize the severity of the fever or when asking someone to feel your forehead.
🔑Key Words
Key Words to learn:
📊Quick Comparison
Depending on where you are and how sick you feel, choose the right expression.
| Phrase | Formality | Best For | Avoid When |
|---|---|---|---|
| Tengo fiebre | Neutral | Any situation (Universal) | Never (it's always correct) |
| Tengo calentura | Informal | Mexico & Central America | In Spain/South America (sexual connotation) |
| Tengo unas décimas | Neutral | Spain/Southern Cone (Low fever) | You have a very high fever |
📈Difficulty Level
Overall Difficulty:beginnerMaster in 10 minutes
Pronunciation2/5
The 'ie' in 'fiebre' (FYEH-breh) is a diphthong that can be tricky, but otherwise straightforward.
Grammar2/5
Requires remembering to use 'Tener' (to have) instead of 'To be', but the structure is simple.
Cultural Nuance3/5
Regional slang (calentura) and the 'Estoy caliente' mistake create some cultural pitfalls.
Key Challenges:
- Remembering not to say 'Estoy caliente'
- Pronouncing the soft 'r' in fiebre
💡Examples in Action
Calling in sick to workA2
No puedo ir a trabajar hoy, tengo fiebre.
I can't go to work today, I have a fever.
Family setting (Mexico/Central America)B1
Creo que el bebé tiene calentura.
I think the baby has a fever.
Casual conversation in Spain regarding mild symptomsB2
Me siento mal, parece que tengo unas décimas.
I feel bad, it seems like I have a slight fever.
Urgent situation, caring for someone sickA2
¡Estás ardiendo! Necesitamos un termómetro.
You're burning up! We need a thermometer.
Formal medical contextC1
El paciente presenta fiebre alta y dolor de cabeza.
The patient presents high fever and headache.
🌍Cultural Context
The 'Calentura' Trap
In Mexico and parts of Central America, 'tengo calentura' is the standard way to say 'I have a fever.' However, in many other countries (like Argentina or Spain), 'calentura' is slang for sexual arousal (horniness). If you are traveling outside of Mexico, stick to 'tengo fiebre' to avoid an awkward mix-up!
Celsius vs. Fahrenheit
Spanish-speaking countries use Celsius. If you say you have a temperature of '100' (Fahrenheit), they will think you are boiling alive! A fever usually starts at 38°C. Anything between 37°C and 38°C is often called 'unas décimas' (a few tenths) or 'febrícula'.
The Magic of VapoRub
In many Latino households, having a fever or cold often leads to one universal cure: Vicks VapoRub (often just called 'Vick' or 'Vivaporú'). It's culturally seen as a miracle cure applied to the chest, feet, or nose, regardless of what the doctor might prescribe.
❌ Common Pitfalls
Using 'Ser' instead of 'Tener'
Mistake: “Saying 'Soy fiebre' or 'Estoy fiebre'.”
Correction: Tengo fiebre.
💡Pro Tips
The Hand-Forehead Gesture
Just like in English-speaking cultures, placing the back of your hand on someone's forehead is the universal non-verbal sign for checking for a fever. You can accompany this by asking, '¿Te sientes mal?' (Do you feel bad?).
Describing Severity
To be more specific, you can say 'tengo fiebre alta' (high fever) or 'tengo fiebre leve' (mild fever). If it's just a little bit, use 'tengo un poco de fiebre'.
🗺️Regional Variations
🌍
Mexico & Central America
Preferred:Tengo calentura
Pronunciation:Standard Latin American Spanish
Alternatives:
Tengo temperaturaEstoy hirviendo (I'm boiling)
It is extremely common to hear 'calentura' here without any sexual connotation in a medical context, unlike almost everywhere else.
⚠️ Note: Don't worry about 'calentura' being offensive here—it's normal.
🇪🇸
Spain
Preferred:Tengo fiebre / Tengo unas décimas
Pronunciation:Thick 'th' sound for 'c' in 'décimas' (DEH-thee-mas)
Alternatives:
Tengo destemplanza (I feel generally unwell/unsettled body temp)
Spaniards are very specific about low-grade fevers, often referring to them as 'décimas' rather than full 'fiebre'.
⚠️ Note: Avoid 'calentura' unless you mean to be vulgar.
🌍
Southern Cone (Argentina/Uruguay/Chile)
Preferred:Tengo fiebre
Pronunciation:Standard, though 'll' sounds vary
Alternatives:
Estoy afiebradoLevanté fiebre (I 'raised' a fever / developed a fever)
Very standard usage of 'fiebre'. 'Calentura' is exclusively slang for anger or lust here.
⚠️ Note: Never use 'calentura' for a medical fever.
💬What Comes Next?
Someone tells you they have a fever
They say:
Tengo fiebre.
I have a fever.
→
You respond:
¡Pobrecito! ¿Te tomaste la temperatura?
Poor thing! Did you take your temperature?
Offering help to someone with a fever
They say:
Me siento muy mal.
I feel very bad.
→
You respond:
¿Quieres que te traiga una pastilla?
Do you want me to bring you a pill/medicine?
🔄How It Differs from English
The biggest difference is the verb choice. In English, you can say 'I am feverish' (adjective) or 'I have a fever' (noun). In Spanish, the standard is almost exclusively 'Tener' (to have) + Noun. Also, Spanish speakers distinguish heavily between a full fever and 'décimas' (a slight rise in temperature).
False Friends & Common Confusions:
"I am hot"
Why it''s different: Translating this literally as 'Estoy caliente' usually means 'I am horny' in Spanish.
Use instead: Use 'Tengo calor' (I feel hot from weather) or 'Tengo fiebre' (I have a fever).
🎯Your Learning Path
✏️Test Your Knowledge
Quick Quiz: I have a fever
Question 1 of 3
You are in Madrid, Spain, and you feel slightly warm but not terrible (around 37.3°C). What is the most natural thing to say?
Use phrases naturally, not mechanically
Knowing a phrase is one thing — using it at the right moment is another. Read 200+ illustrated and narrated Spanish stories to see phrases in the contexts where they actually belong.
Frequently Asked Questions
Can I say 'Soy fiebre'?
No, never. 'Soy' comes from the verb 'Ser' (to be). You cannot 'be' a fever. You must use the verb 'Tener' (to have) -> 'Tengo fiebre'.
Is 'calentura' a bad word?
It depends on the region. In Mexico, it is a normal medical word for fever. In Spain and South America, it is slang for sexual excitement. It's safest to use 'fiebre' if you are unsure.
How do I say 'I have a high fever'?
You can say 'Tengo fiebre alta' or 'Tengo mucha fiebre'. If it is extremely high, you can say 'Estoy ardiendo' (I am burning up).
Do Spanish speakers use Fahrenheit or Celsius?
They use Celsius. A fever is generally considered 38°C or higher. Normal body temperature is around 36.5°C - 37°C.
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