Can a 1-year-old have seasonal allergies?

True pollen allergies are uncommon before age 2 because a child needs to be exposed across two pollen seasons before the immune system becomes sensitized. Symptoms before that age are more likely a cold or a reaction to indoor allergens like dust mites or pet dander. Talk to your pediatrician if symptoms are persistent.

How can I tell if my toddler has allergies or a cold?

Allergies cause itchy, watery eyes, a clear runny nose, and sneezing, with no fever, and they last as long as the child is exposed to the trigger. A cold often brings a low-grade fever, mucus that thickens and may turn yellow or green, and usually clears within 7 to 10 days. Itchiness points strongly to allergies.

At what age can a child take allergy medicine?

Loratadine (Claritin) is approved from age 1. Cetirizine (Zyrtec) is not approved for allergies under age 2, and for ages 2 to 6 you should ask your child's doctor first. For any child under 2, do not give over-the-counter antihistamines or decongestants without pediatrician guidance.

Do seasonal allergies cause a fever in children?

No. Seasonal allergies do not cause fever. If your child has a fever along with congestion, the cause is more likely a viral infection such as a cold. A fever lasting more than 4 days warrants a call to your pediatrician.

How do I reduce my child's pollen exposure at home?

Use air conditioning in your home and car instead of opening windows during high-pollen periods, keep windows closed on high-pollen days, limit outdoor time when counts are high, and bathe your child and change their clothes after playing outside to remove pollen from skin and hair.

When should I see a doctor about my child's allergies?

See your pediatrician if symptoms persist, return every season, or interfere with sleep or daily activity. Your pediatrician may refer you to a pediatric allergist if testing, longer-term medication, or more specialized treatment is needed.

Spring safety · 0–5 yr

Seasonal Allergies in Babies and Toddlers: a Spring Guide

Seasonal allergies rarely appear in the first year because a child needs to be exposed to pollen across two seasons before becoming sensitized. Most true pollen allergies start between ages 2 and 5.

2 min read Seasonal Safety Updated June 2026

When seasonal allergies actually start

Pollen allergies are uncommon before age 2. A child generally has to live through two full pollen seasons before the immune system reacts, so the first year is almost always too early.

Symptoms most often begin between ages 2 and 3, with allergies most commonly developing between ages 3 and 5. Indoor allergens like dust mites, pet dander, and mold can cause year-round symptoms earlier, around ages 1 to 2, because exposure never stops.

Signs it is allergies and not a cold

Itchiness is the clearest signal. The AAP calls it the hallmark of an allergy problem, and it is not usually present with a cold.

Look for a clear runny nose, repeated sneezing, and itchy, watery, red eyes. Some children also get puffy eyelids and dark marks under the eyes. Allergies do not cause fever and rarely cause a sore throat.

Clear, watery nasal discharge that stays thin
Itchy, red, watery eyes
Sneezing in rapid bursts
No fever
Symptoms that last weeks and track with time outdoors

Reducing pollen exposure

Run air conditioning in your home and car rather than opening windows during high-pollen periods. Closed windows keep most pollen out.

Limit outdoor time on high-pollen days, and bathe your child and change their clothes after outdoor play so pollen does not linger on skin and fabric.

When antihistamines are appropriate

For any child under 2, do not give an over-the-counter antihistamine or decongestant without your pediatrician's direction. The FDA warns of serious side effects in this age group.

Loratadine (Claritin) is approved from age 1 and up. Cetirizine (Zyrtec) is not approved for allergies under age 2, and for ages 2 to 6 you should check with your child's doctor before using it. See your pediatrician if symptoms persist; they may refer you to a pediatric allergist for testing or longer-term treatment.

Common questions

Can a 1-year-old have seasonal allergies?: True pollen allergies are uncommon before age 2 because a child needs to be exposed across two pollen seasons before the immune system becomes sensitized. Symptoms before that age are more likely a cold or a reaction to indoor allergens like dust mites or pet dander. Talk to your pediatrician if symptoms are persistent.
How can I tell if my toddler has allergies or a cold?: Allergies cause itchy, watery eyes, a clear runny nose, and sneezing, with no fever, and they last as long as the child is exposed to the trigger. A cold often brings a low-grade fever, mucus that thickens and may turn yellow or green, and usually clears within 7 to 10 days. Itchiness points strongly to allergies.
At what age can a child take allergy medicine?: Loratadine (Claritin) is approved from age 1. Cetirizine (Zyrtec) is not approved for allergies under age 2, and for ages 2 to 6 you should ask your child's doctor first. For any child under 2, do not give over-the-counter antihistamines or decongestants without pediatrician guidance.
Do seasonal allergies cause a fever in children?: No. Seasonal allergies do not cause fever. If your child has a fever along with congestion, the cause is more likely a viral infection such as a cold. A fever lasting more than 4 days warrants a call to your pediatrician.
How do I reduce my child's pollen exposure at home?: Use air conditioning in your home and car instead of opening windows during high-pollen periods, keep windows closed on high-pollen days, limit outdoor time when counts are high, and bathe your child and change their clothes after playing outside to remove pollen from skin and hair.
When should I see a doctor about my child's allergies?: See your pediatrician if symptoms persist, return every season, or interfere with sleep or daily activity. Your pediatrician may refer you to a pediatric allergist if testing, longer-term medication, or more specialized treatment is needed.

Sources & further reading

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This guide reflects current AAP, CDC, and other public-health guidance and is for educational purposes only. It does not constitute medical advice. ParentFlow is a wellness companion — not a substitute for your pediatrician. For any medical concern, contact your healthcare provider.