Is Your Baby Teething or Sick? How to Tell the Difference

Image
Image
January 5, 2026

As a parent, noticing changes in your baby’s behavior can be concerning. Whether it’s excessive crying, disrupted sleep, or loss of appetite, the symptoms can feel similar when your baby is teething or getting sick. Both situations are common in babies, but distinguishing between the two can sometimes be tricky.

Understanding the signs and knowing how to tell the difference can help you provide the right care and comfort your baby needs. Is it teething, a natural milestone? Or is your baby experiencing something more serious, like an illness? Here’s what to look out for to keep your baby comfortable and safe.

Understanding Teething Symptoms

Teething occurs when your baby’s first set of teeth starts to break through the gums. This usually begins around 6 months, though some babies may start earlier or later. Teething can cause discomfort, but it is a normal part of your baby’s growth and development.

Common teething symptoms include:

  • Drooling: Babies tend to drool more than usual when teething as their mouths produce extra saliva.
  • Biting or chewing on objects: To relieve gum pressure, babies often bite down on toys, fingers, or anything they can grab.
  • Gums appearing swollen or tender: You may notice the gums are red or inflamed where a tooth is about to emerge.
  • Irritability or fussiness: As your baby’s teeth break through, they may feel more cranky than usual due to the discomfort.
  • Sleep disturbances: Teething pain can make it harder for babies to sleep, causing frequent waking or difficulty falling asleep.

While teething can be uncomfortable, remember it’s a temporary phase, and it’s part of your baby’s natural development. Rest assured that this stage will pass as your baby’s teeth come through.

Identifying Illness Symptoms in Babies

Illness in babies can present symptoms that overlap with teething, but they typically tend to be more severe and longer-lasting. Here are some common signs that your baby may be sick:

  • Fever: If your baby’s temperature exceeds 100.4°F (38°C), it’s likely an indication of illness rather than teething.
  • Runny nose or cough: A common cold or other respiratory infections can cause congestion and a cough, symptoms that are not linked to teething.
  • Vomiting or diarrhea: These symptoms are not related to teething and suggest your baby may have an infection.
  • Lethargy or unusual lack of interest in feeding: If your baby seems overly tired or refuses to eat, it could be a sign of illness rather than teething discomfort.

Sickness in babies is usually accompanied by more severe symptoms that can last for a few days. If you notice any of these signs, it’s important to consult your pediatrician as soon as possible.

Key Differences Between Teething and Sickness

Teething and sickness can often present similar symptoms, such as fussiness, irritability, and disrupted sleep, making it challenging for parents to tell the difference. However, the two conditions typically vary in severity, duration, and accompanying symptoms. Understanding these differences can help you provide the best care for your baby.

  1. Severity and Duration:
    As per a qualified pediatric dentist in South San Francisco, teething symptoms are generally mild and temporary, often lasting only a few days to a week. The discomfort usually peaks as the tooth emerges and then subsides quickly.

On the other hand, sickness often involves more severe symptoms that can last for several days. If your baby’s discomfort persists beyond a week or is associated with more serious symptoms, illness is more likely.

  1. Fever:
    One of the most significant differences between teething and illness is the presence of fever. While teething can cause some mild irritation and discomfort, it does not typically lead to a fever.

If your baby has a fever above 100.4°F (38°C), this is more likely to indicate an illness such as a cold or infection. A fever is rarely caused by teething and may suggest something more serious, such as an ear infection, cold, or flu.

  1. Energy Levels:
    A teething baby may be fussy, but they generally remain active and alert despite the discomfort. You may notice that they continue to play, interact, and even show their usual curiosity, although they might be a little more irritable than usual.

In contrast, a sick baby may exhibit a noticeable decline in energy. They might seem lethargic, more clingy, and less interested in feeding or playing. This drop in energy is a telltale sign that illness may be the cause.

By understanding these differences, you can better assess your baby’s condition and decide when it’s time to consult a professional for peace of mind and the proper care.

When to Seek Medical Advice

While teething is generally harmless, certain symptoms could signal a more serious illness that requires a doctor’s attention. Here are a few signs to watch out for:

  • If the fever lasts more than 3 days, Teething doesn’t cause prolonged fevers. If your baby has a fever that lasts for more than a couple of days, it’s important to consult your pediatrician.
  • If there’s vomiting, diarrhea, or a significant drop in appetite: These are more serious signs of illness that require medical attention.
  • If your baby shows unusual lethargy or seems unresponsive: If your baby is very tired or seems to lack energy, it could indicate an illness that needs to be addressed.

If you’re unsure, don’t hesitate to seek professional help. It’s always better to be safe than sorry when it comes to your baby’s health.

Home Remedies for Teething Relief

Teething can be uncomfortable, but there are several things you can do at home to help soothe your baby’s pain:

  • Teething rings or cold washcloths: Giving your baby a teething ring or a cold, damp washcloth to chew on can relieve some of the discomfort by numbing the gums.
  • Gently massaging the gums: Using a clean finger, gently massage your baby’s sore gums to ease the pressure.
  • Cold foods (if baby is eating solids): If your baby has started solids, chilled fruits or vegetables can help numb the gums and provide relief.

There are also over-the-counter remedies available, such as teething gels or pain relievers, but always check with a professional pediatric dentist in South San Francisco before using any products to ensure they are safe for your baby.

When to Consult a Professional for Illness Symptoms

If you suspect your baby is sick, keeping track of their symptoms is important. Here are some steps to help manage the situation:

  • Monitor temperature: If your baby’s fever is high or persistent, it’s important to seek medical attention.
  • Hydration: Make sure your baby stays hydrated, especially if they have diarrhea or vomiting.
  • Seek help if symptoms persist: If your baby shows signs of dehydration, a weakened immune system, or symptoms that don’t improve, consult your pediatrician immediately.

Trust your instincts. If you feel your baby isn’t getting better or their symptoms worsen, reach out to a professional for guidance.

Both teething and illness are common experiences for babies, and while they can be concerning, they can usually be managed with the right care. Teething is a temporary phase, while illness often involves more severe and longer-lasting symptoms. By understanding the differences, you can provide your baby with the right comfort and care.

If you’re unsure whether your baby is teething or sick, don’t hesitate to consult your professional for peace of mind and professional guidance. At South City Pediatric Dentistry, we’re here to support your baby’s health and well-being every step of the way.

People Also Ask

Can teething cause diarrhea?

Teething can sometimes lead to mild, loose stools, but it doesn’t typically cause diarrhea. If your baby experiences persistent diarrhea, it’s likely due to an illness.

What can I do to soothe my baby’s teething pain?

Offer a cold teething ring, gently massage their gums, or provide cold, soft foods if they’re eating solids. Over-the-counter remedies may also help, but check with your pediatrician first.

How can I tell if my baby is just fussy due to teething or something more serious?

If your baby is still active and their symptoms are mild, it’s likely teething. If they have a high fever, won’t eat, or are unusually lethargic, it may be an illness.

When should I take my baby to the pediatrician for teething pain?

If your baby is in severe pain despite home remedies or if teething symptoms last longer than usual, it’s a good idea to check in with your pediatrician for further guidance.

New Patients & Emergency Appointments Welcome!