Blog

When a Fever Requires Medical Attention

A fever is one of the biggest concerns that parents have when it comes to their infant or child. We understand that a fever can sometimes be considered an emergency and you’ll need prompt medical attention. Of course, the good news is that often a fever will improve on its own. Know when your child’s fever warrants seeing their pediatrician for care.

What is considered a fever?

A healthy body temperature is 98.6 F; however, many things can elevate a person’s temperature including intense exercise, so not all temperature fluctuations mean that your child is sick; however, an illness or infection can certainly shift your body’s temperature as it works to fight off the bacteria or virus.

What can cause a fever?

There are quite a few reasons why your child might be dealing with a fever. Some common causes include:

  • Viral infections (e.g. cold; flu)
  • Bacterial infections
  • Severe sunburns
  • Heat exhaustion or heat stroke
  • Inflammatory health problems
  • Side effects of certain medications

When to see a pediatrician for your infant’s fever?

A fever that develops in an infant (babies under 3 months old) is often a far more serious matter than fevers in children. If your infant develops a fever of 100.4 F or over, it’s highly recommended that you bring them to your pediatrician right away for care.

When to seek medical attention for your child’s fever?

By the age of 3 years old, most children will have developed at least one fever. While some fevers won’t be anything to worry about and will go away on their own, it is important to know when your child’s fever requires medical attention. You should call your pediatrician if:

  • Your child’s fever persists for more than 5 days
  • The fever is over 104 F
  • Your child has symptoms of dehydrated
  • Medications aren’t helping to reduce their fever

If you are ever concerned about the health of your child, it’s important that you call your pediatrician. They can talk to you over the phone and discuss your child’s symptoms in greater detail to determine whether they need to come in for treatment. If your child has a fever and you’re worried, call your pediatrician right away to ease your worries.

Cathy Alvarez, MSN, CPNP-PC

Family Practice

Cathy Alvarez, MSN, CPNP-PC, is a board-certified Pediatric Nurse Practitioner with over two decades of experience dedicated to nurturing the health and well-being of children from birth through adolescence. Known for her warm, individualized approach to care, Cathy is passionate about building lasting relationships with her patients and their families—many of whom she’s supported through every milestone of childhood.

Cathy began her nursing career after earning her Bachelor of Science in Nursing from the University of Illinois at Chicago in 1999. She gained valuable experience working on the inpatient pediatric unit at Advocate Lutheran Children’s Hospital in Aurora. Driven to deepen her impact, she returned to UIC to complete the Pediatric Nurse Practitioner program, earning her Master of Science in Nursing in 2005. She is certified by the Pediatric Nursing Certification Board (PNCB) and has since devoted her career to providing expert care to diverse pediatric populations.

She is an active member of the National Association of Pediatric Nurse Practitioners and the American Cleft Palate-Craniofacial Association, always staying at the forefront of pediatric healthcare.
Fluent in English and Polish, with conversational Spanish skills, Cathy connects seamlessly with families from many cultural backgrounds.

Outside of work, you can find her cheering on her son at soccer games, exploring new destinations, and enjoying quality time with her family. Her caring spirit and clinical excellence make her a trusted partner in every child’s healthcare journey.” 

Marixa Alvarez, ARN, MSN, FNP-BC

Family Practice

Marixa Alvarez, ARN, MSN, FNP-BC, is a dedicated and compassionate Family Nurse Practitioner, board certified by the American Nurses Credentialing Center. She earned her Master of Science in Nursing from Lewis University, where she cultivated her passion for holistic, patient-centered care.

Fluent in both English and Spanish, Marixa connects deeply with diverse communities, ensuring every patient feels heard and supported. Outside of the clinic, you’ll likely find her in the kitchen—cooking, baking, and bringing people together over a homemade meal. A fun fact? Marixa has a knack for solving puzzles and putting things together—whether it’s a 1,000-piece jigsaw or helping patients piece together their path to better health.

Carlos Sian, PA

Physician Assistant

Carlos is a board-certified Physician Assistant who joined the IWS Family Health team in January 2024. He was born and raised in Antigua, Guatemala and is fluent in both English and Spanish.

His academic journey began at Saint Michael’s College, where he earned a Bachelor of Science in Biology alongside minors in Chemistry and Religious Studies. Driven by a commitment to service, he devoted a year to volunteering as a medical assistant at a health clinic in Albuquerque, NM, through the Jesuit Volunteer Corps. This experience solidified his interest in medicine, inspiring him to delve deeper into healthcare and ultimately leading Carlos to pursue a Master of Public Health in Community Health Sciences and Infectious Diseases from Boston University School of Public Health.

Following his MPH, Carlos dedicated several years to the public health sector, primarily serving as a linkage to care coordinator,  clinical research coordinator, and COVID-19 contact tracer. Moved by a need to help his community during the 2020 pandemic, he secured admission to and completed the Northwestern University Feinberg School of Medicine PA program, earning his Master of Medical Science degree.

Carlos aims to integrate his public health training with his medical practice to bring culturally competent and inclusive medical services to all his patients, but specially the Hispanic/Latino and LGTBQ+ communities he serves. In his downtime, Carlos enjoys cooking, collecting plants, fostering dogs, playing video games, watching reality TV shows, and adding more stamps to his passport!

Dr. Tara Ioffe

Family Practice

Dr. Tara Ioffe is a dedicated and compassionate Board-Certified Family Medicine physician with a strong commitment to providing excellent care to her patients. She obtained her medical degree from Avalon University in Curacao and went on to complete her Family Medicine Residency at the University of Oklahoma. She has worked at the University of Chicago and most recently NorthShore University. She has since returned to Chicago and is thrilled to join the IWS Family Health team in 2023, where she will continue to provide excellent care to her patients.

Throughout her career, Dr. Ioffe has gained experience in diverse medical fields, such as immediate and urgent care medicine while working at NorthShore Immediate Care. She did clinical research at the University of Chicago. Dr. Ioffe strives to foster a secure and inclusive environment for all her patients. She believes in an integrated approach to medicine, dedicating her time to understand each patient’s unique needs.

During her leisure time, Dr. Ioffe indulges in reading a variety of books for pleasure, plays boardgames, and loves to explore Chicago with her spouse and young child.