What Causes Feeling Feverish But No Fever?

1. Psychogenic fever

Psychogenic fever is a stress-related condition that could cause an increase in body temperature or feverish symptoms. This condition may be triggered by traumatic events or chronic stress. 

2. Urinary tract infection (UTI) or kidney stones

Inflammation caused by a UTI or kidney stones could cause inflammation throughout the body and result in chills but no fever.

3. Hangover

After a bout of heavy drinking, you may experience a hangover, which can cause chills without a fever. You may also have symptoms such as:

• Rapid heartbeat
• Dizziness and vertigo
• Headaches and muscle aches
• Weakness
• Nausea
• Vomiting
• Sweating and thirst

4. Hypothermia

When the body loses heat rapidly, it tries to warm itself up by contracting your muscles, causing chills. This can cause you to feel feverish even though your temperature hasn’t risen. Other signs of hypothermia include:

• Sleepiness
• Slurred speech
• Low energy
• Confusion
• Clumsiness
• Slowed, shallow breathing
• Weakened pulse
• Bright red, cold skin

5. Hypothyroidism

Hypothyroidism is a condition where your thyroid gland doesn’t produce enough of certain hormones. Apart from chills and feverish symptoms, hypothyroidism may also cause:

• Fatigue
• Dry skin
• Depression
• Constipation
• Absent-mindedness

6. Hypoglycemia

Hypoglycemia causes your blood sugar to drop to a dangerously low level and may cause feelings of feverishness. This most often occurs in people with diabetes who are on medications such as sulfonylurea and insulin. Other signs of hypoglycemia may include

• Trembling
• Anxiety
• Weakness
• Clammy skin
• Sweating
• Hunger
• Nausea
• Sleepiness

7. Menopause

Menopause, when a woman stops menstruating, can cause night sweats or hot flashes. Other symptoms include:

• Vaginal dryness
• Urinary urgency
• Difficulty sleeping
• Emotional changes
• Dry skin, dry mouth, or dry mouth
• Cold flashes

8. Infections

If you have the flu, another type of infection, or a skin abscess, you may experience chills without a fever. This may also happen if you have tuberculosis or sepsis.

9. Panic attacks

Panic attacks can cause sudden, brief, but strong reactions in your body. While your temperature may not go up, you may experience chills as well as:

• Chest pain
• Nausea
• Difficulty breathing
• Racing heart
• Trembling or shaking
• Sweating
• Tingling or numbness in fingers or toes
• Choking or smothering sensation

In some cases, anxiety can make you feel feverish without actually increasing your body temperature. In other cases, it can cause a recordable fever

In some cases, anxiety can make you feel feverish without actually increasing your body temperature. In other cases, it can cause a recordable fever. 

Fever is defined as a body temperature of 100.4 F or more and is usually a sign of infection. However, it can occur due to other causes as well, such as heat exhaustion or hormonal disorders. With anxiety or panic attacks, the rise in temperature may be a result of high levels of stress hormones in your body that increase blood flow to your heart.

Anxiety can cause signs and symptoms such as:

• Racing heartbeat
• Sweating
• Rapid breathing
• Uneasiness
• Lack of sleep
• Increased blood pressure
• Muscle spasms
• Headache
• Nausea

Fever related to anxiety typically occurs during stressful situations, but may also be a sign of certain underlying conditions, such as:

• Thyroid storm
• Cocaine abuse
• Serotonin syndrome
• Malignant hyperthermia
• Overdose of medications such as anticholinergics and methamphetamine

While everyone deals with anxious feelings at some point, whether it’s fear or apprehension regarding specific situations, the anxiety is typically temporary and short-lived. It may even give you the extra boost or impetus you need to achieve a goal. 

However, when anxiety is overwhelming, persistent, and affects your ability to function, it is classified as an anxiety disorder. Examples of anxiety disorders include:

• Generalized anxiety disorder (GAD): GAD is characterized by excessive fear or apprehension about finances, health, relationships, work or school performance, etc. In order to be classified as GAD, symptoms may persist most days for at least 6 months and may interfere with sleep, relationships, and performance at work and school. The person may feel restless and irritable and find it difficult to focus on tasks, personal well-being, or even simple conversations.
• Panic disorder: This type of anxiety disorder is characterized by panic attacks, which is a sudden feelings of terror in the absence of danger. A person with panic disorder tends to have several attacks that come suddenly and subside over several minutes. Panic attacks can start at any time without any warning signs. 
• Phobias: A phobia is an excessive, irrational fear of something that isn’t actually that harmful. Encountering something that triggers the phobia can lead to symptoms such as sweating, heart palpitations, and difficulty breathing. Examples of phobias include:
  • Claustrophobia (fear of closed spaces)
  • Arachnophobia (fear of spiders)
  • Hemophobia (fear of blood)
  • Acrophobia (fear of heights)
  • Aerophobia (fear of flying) 
  • Ophidiophobia (fear of snakes)

Unlike other causes of fever such as infections, anxiety disorders do not respond well to antipyretics or to fever medications. Treatment involves treating the underlying anxiety, typically through a combination of:

• Medications: Anti-anxiety medications (benzodiazepines), beta-blockers, and antidepressants can help manage symptoms. Medications are often prescribed along with psychotherapy.
• Psychotherapy: Psychotherapy mainly involves multiple sessions of cognitive behavioral therapy (CBT) with a therapist. CBT focuses on changing thought processes and behaviors that lead to anxiety. Examples include exposure therapy, which helps you confront anxiety triggers, or teaching stress management techniques such as meditation and relaxation exercises.