Published on Jun 30, 2023 | 2:48 PM
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Malaria is a serious and potentially life-threatening infectious disease caused by parasites transmitted through the bite of infected mosquitoes. While malaria is rare in the United States, it remains a significant global health concern and poses a real risk to travelers visiting endemic regions.
Understanding how malaria spreads, how to recognize early symptoms, and how to prevent infection is essential—especially for those planning international travel.
Malaria is caused by Plasmodium parasites, which are transmitted to humans through the bite of an infected Anopheles mosquito. Once inside the body, the parasite travels to the liver and then infects red blood cells, where it multiplies and causes illness.
There are several species of Plasmodium that infect humans, with Plasmodium falciparum being the most severe and potentially fatal if not treated promptly.
Malaria is not spread person-to-person through casual contact. Transmission occurs primarily through mosquito bites and, in rare cases, through blood transfusion, organ transplantation, or from mother to baby during pregnancy.
Malaria is most commonly found in:
Sub-Saharan Africa
South and Southeast Asia
Central and South America
Parts of the Caribbean
The Middle East
Oceania
Travelers visiting these regions should be aware of malaria risk and take appropriate preventive measures.
Malaria transmission occurs when:
An infected mosquito bites a person
The parasite enters the bloodstream
The parasite multiplies in the liver and red blood cells
Mosquitoes that spread malaria typically bite between dusk and dawn, making nighttime protection especially important.
Symptoms of malaria usually develop 7 to 30 days after exposure, though some cases may present months later depending on the species.
Common symptoms include:
Fever and chills
Sweating
Headache
Muscle aches
Fatigue
Nausea, vomiting, or diarrhea
Severe malaria symptoms may include:
Confusion or altered mental status
Difficulty breathing
Severe anemia
Jaundice (yellowing of skin or eyes)
Organ failure
Malaria symptoms can resemble influenza or other viral illnesses, which is why travel history is critical when seeking care.
Malaria can progress rapidly, especially P. falciparum infections. Delayed treatment increases the risk of complications and death. Early diagnosis and prompt treatment significantly improve outcomes.
Anyone who develops fever after traveling to a malaria-endemic area should seek medical evaluation immediately—even if preventive medication was taken.
Malaria is diagnosed through:
Blood tests that detect malaria parasites
Rapid diagnostic tests (RDTs)
Microscopic examination of blood smears
Diagnosis confirms the presence of parasites and helps determine the appropriate treatment.
Treatment depends on:
The type of Plasmodium parasite
Severity of illness
Geographic location of exposure
Medication resistance patterns
Common treatments include:
Artemisinin-based combination therapies (ACTs)
Chloroquine (in areas without resistance)
Other antimalarial medications as prescribed
Severe malaria may require hospitalization and intravenous treatment.
Prevention is the most effective strategy against malaria.
Use EPA-approved insect repellents (such as DEET or picaridin)
Wear long sleeves and pants
Sleep under insecticide-treated bed nets
Stay in air-conditioned or screened accommodations
For travelers to high-risk areas, healthcare providers may prescribe antimalarial prophylaxis. These medications must be taken before, during, and after travel to be effective.
Medication choice depends on travel destination, length of stay, medical history, and resistance patterns.
You should seek immediate medical evaluation if:
You develop fever during or after travel to a malaria-risk area
Symptoms appear weeks or months after travel
You experience severe symptoms such as confusion or breathing difficulty
Malaria is a medical emergency when untreated.
Call-On-Doc provides convenient online access to licensed medical providers who can help assess malaria risk, prescribe preventive medications when appropriate, and guide next steps if symptoms develop.
Whether you’re preparing for international travel or concerned about symptoms after a trip, Call-On-Doc offers fast, reliable care without the need for in-person visits.
updated 1/21/2026 Shelly House, FNP, is a Family Nurse Practitioner and Call-On-Doc’s trusted medical education voice. With extensive experience in telehealth and patient-centered care, Ms. House is dedicated to making complex health topics simple and accessible. Through evidence-based content, provider collaboration, and a passion for empowering patients, her mission is to break down barriers to healthcare by delivering clear, compassionate, and practical medical guidance.
Post-Vacation Fatigue: What Your Body Is Telling You
Most people expect to feel refreshed after vacation.
But for many travelers, the opposite happens.
Instead of returning home energized, they come back feeling exhausted, mentally drained, foggy, and struggling to get back into their normal routine.
While post-vacation fatigue is often temporary, it's usually your body's way of responding to changes in sleep, activity levels, travel stress, dehydration, disrupted routines, or even an underlying illness picked up during the trip.
Understanding what's causing your fatigue can help you recover faster and recognize when symptoms may need medical attention.
Poor sleep during travel
Time zone changes
Dehydration
Increased physical activity
Travel-related stress
Illness exposure
Alcohol consumption
Disrupted routines
Fatigue lasting more than several weeks
Persistent fever
Shortness of breath
Severe weakness
Ongoing vomiting or diarrhea
Symptoms that continue worsening
Vacations are often associated with relaxation and recovery.
However, travel places unique demands on the body.
Long flights, road trips, disrupted sleep schedules, increased physical activity, unfamiliar environments, and changes in daily habits can all affect how you feel after returning home.
For some people, the fatigue lasts only a day or two.
For others, it can linger much longer.
The key is understanding what your body may be trying to tell you.
Jul 01, 2026 | 5:13 PM
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Why Your Routine Matters More During Summer
Summer is often viewed as a time to relax schedules and enjoy more freedom.
Vacations, longer daylight hours, school breaks, travel, social events, and outdoor activities can all disrupt normal routines.
While occasional flexibility is healthy, losing structure completely can affect sleep, energy levels, eating habits, stress management, exercise consistency, and even mental health.
Many people don't realize how much their daily routines support their overall well-being until those routines disappear.
Poor sleep
Increased fatigue
Difficulty staying hydrated
Weight gain
Increased stress
Mood changes
Lack of motivation
Difficulty getting back on track
Persistent fatigue
Ongoing sleep problems
Symptoms of depression
Severe anxiety
Significant weight changes
Symptoms that continue worsening
Summer brings a welcome break from many of the schedules that dominate the rest of the year.
School is out.
Vacations are planned.
Outdoor activities increase.
Social calendars fill up.
For many people, these changes are part of what makes summer enjoyable.
However, routines often provide more benefits than people realize.
When routines disappear entirely, healthy habits can begin to disappear with them.
Jul 01, 2026 | 5:02 PM
Read More
Why Vacation Doesn't Always Reduce Stress
Most people think vacation automatically leads to relaxation.
But if you've ever returned from a trip feeling exhausted, overwhelmed, or like you need another vacation to recover from your vacation, you're not alone.
While vacations can be beneficial for mental and physical health, they don't always eliminate stress. Travel planning, disrupted routines, financial pressures, family dynamics, sleep changes, and packed schedules can sometimes create new stressors instead of relieving existing ones.
Understanding why this happens can help you set more realistic expectations and get more out of your time away.
Feeling exhausted after returning home
Increased anxiety
Irritability
Difficulty sleeping
Mental fatigue
Feeling overwhelmed
Trouble returning to normal routines
Physical exhaustion
Persistent anxiety
Ongoing sleep problems
Severe fatigue
Symptoms of depression
Difficulty functioning at work or home
Symptoms that continue worsening
Vacations are often marketed as the solution to stress.
Book the trip.
Take time off.
Relax.
Come back refreshed.
While that certainly happens for many people, real life is often more complicated.
Some people return home feeling energized.
Others come back feeling physically exhausted, mentally drained, and immediately overwhelmed by everything waiting for them.
The reason is simple: taking time away from work doesn't automatically eliminate every source of stress.
Jul 01, 2026 | 4:52 PM
Read More
Post-Vacation Fatigue: What Your Body Is Telling You
Most people expect to feel refreshed after vacation.
But for many travelers, the opposite happens.
Instead of returning home energized, they come back feeling exhausted, mentally drained, foggy, and struggling to get back into their normal routine.
While post-vacation fatigue is often temporary, it's usually your body's way of responding to changes in sleep, activity levels, travel stress, dehydration, disrupted routines, or even an underlying illness picked up during the trip.
Understanding what's causing your fatigue can help you recover faster and recognize when symptoms may need medical attention.
Poor sleep during travel
Time zone changes
Dehydration
Increased physical activity
Travel-related stress
Illness exposure
Alcohol consumption
Disrupted routines
Fatigue lasting more than several weeks
Persistent fever
Shortness of breath
Severe weakness
Ongoing vomiting or diarrhea
Symptoms that continue worsening
Vacations are often associated with relaxation and recovery.
However, travel places unique demands on the body.
Long flights, road trips, disrupted sleep schedules, increased physical activity, unfamiliar environments, and changes in daily habits can all affect how you feel after returning home.
For some people, the fatigue lasts only a day or two.
For others, it can linger much longer.
The key is understanding what your body may be trying to tell you.
Jul 01, 2026 | 5:13 PM
Why Your Routine Matters More During Summer
Summer is often viewed as a time to relax schedules and enjoy more freedom.
Vacations, longer daylight hours, school breaks, travel, social events, and outdoor activities can all disrupt normal routines.
While occasional flexibility is healthy, losing structure completely can affect sleep, energy levels, eating habits, stress management, exercise consistency, and even mental health.
Many people don't realize how much their daily routines support their overall well-being until those routines disappear.
Poor sleep
Increased fatigue
Difficulty staying hydrated
Weight gain
Increased stress
Mood changes
Lack of motivation
Difficulty getting back on track
Persistent fatigue
Ongoing sleep problems
Symptoms of depression
Severe anxiety
Significant weight changes
Symptoms that continue worsening
Summer brings a welcome break from many of the schedules that dominate the rest of the year.
School is out.
Vacations are planned.
Outdoor activities increase.
Social calendars fill up.
For many people, these changes are part of what makes summer enjoyable.
However, routines often provide more benefits than people realize.
When routines disappear entirely, healthy habits can begin to disappear with them.
Jul 01, 2026 | 5:02 PM
Why Vacation Doesn't Always Reduce Stress
Most people think vacation automatically leads to relaxation.
But if you've ever returned from a trip feeling exhausted, overwhelmed, or like you need another vacation to recover from your vacation, you're not alone.
While vacations can be beneficial for mental and physical health, they don't always eliminate stress. Travel planning, disrupted routines, financial pressures, family dynamics, sleep changes, and packed schedules can sometimes create new stressors instead of relieving existing ones.
Understanding why this happens can help you set more realistic expectations and get more out of your time away.
Feeling exhausted after returning home
Increased anxiety
Irritability
Difficulty sleeping
Mental fatigue
Feeling overwhelmed
Trouble returning to normal routines
Physical exhaustion
Persistent anxiety
Ongoing sleep problems
Severe fatigue
Symptoms of depression
Difficulty functioning at work or home
Symptoms that continue worsening
Vacations are often marketed as the solution to stress.
Book the trip.
Take time off.
Relax.
Come back refreshed.
While that certainly happens for many people, real life is often more complicated.
Some people return home feeling energized.
Others come back feeling physically exhausted, mentally drained, and immediately overwhelmed by everything waiting for them.
The reason is simple: taking time away from work doesn't automatically eliminate every source of stress.
Jul 01, 2026 | 4:52 PM
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