It’s April in Maryland, and you feel miserable.
Congested. Headachy. Eyes watering. Nose running constantly. You’re not sure whether to take an antihistamine, reach for a cold remedy, call your doctor, or just wait it out.
This is one of the most common questions we see in our Rockville clinic every spring:
“I can’t tell if it’s my allergies acting up, a cold, or a sinus infection. Does it actually matter which one it is?”
It matters more than most people realize.
Treating a sinus infection with an antihistamine won’t help. Taking antibiotics for allergies can cause real harm. And pushing through a secondary infection without treatment is how a manageable problem becomes a complicated one.
Here’s how to read your own symptoms, clearly.
Start With One Question: Are Your Eyes Itchy?
This is the single fastest differentiator between the three.
Itchy, watery eyes are almost exclusively a symptom of allergies. Colds and sinus infections share many overlapping symptoms with allergies — but not this one.
If your eyes are itching and watering, you are almost certainly dealing with an allergic reaction, not an infection. In Maryland this April, that most likely means oak, hickory, ash, or maple pollen, all currently at elevated counts across the greater Rockville area.
If your eyes are not itchy, keep reading. The picture gets more nuanced.
The Symptom-by-Symptom Breakdown
Runny nose
All three conditions cause this. What matters is what’s coming out.
- Clear and watery → points to allergies
- Clear at first, then turning thick or discolored after a few days → cold progressing naturally
- Thick yellow or green mucus can occur with inflammation from both colds and sinus infections, but is more concerning if symptoms last more than 10-days
Sneezing
- Frequent sneezing, especially in bursts, is a classic allergy sign
- Sneezing with a cold is typically moderate and part of an overall illness pattern
- Sinus infections don’t usually involve significant sneezing
Facial pressure and pain
- Heavy pressure around the cheeks, forehead, and behind the eyes is the hallmark of a sinus infection
- Mild sinus pressure can accompany allergies when congestion is severe
- A cold may cause minor discomfort, but usually not the intense facial pain of sinusitis
Fever
- Allergies do not cause fever — ever
- A cold may cause a low-grade fever, particularly in the first few days
- A sinus infection, especially bacterial, may cause a notable fever alongside facial pain
How long have symptoms lasted
- Allergies persist as long as the trigger is present, for Maryland pollen sufferers, that can mean weeks
- Colds run their course in 7–10 days and then resolve
- A sinus infection does not get better on its own within 10 days, and often gets worse after seeming to briefly improve
The 10-Day Rule
This is one of the most useful guidelines for telling a cold apart from a sinus infection.
If your symptoms worsen after day 5 or are still present and not improving after day 10, it is likely no longer a cold.
At that point, you’re probably dealing with a secondary sinus infection, and it warrants a doctor’s evaluation rather than more over-the-counter management.
Quick Reference: Which Is It?
You likely have ALLERGIES if:
- Eyes are itchy and watery
- Symptoms follow a seasonal pattern or appear around specific triggers
- Sneezing is frequent, often in bursts
- Mucus is clear and watery
- No fever
- Symptoms improve indoors, after rain, or after taking an antihistamine
To know more about seasonal allergy symptoms and their treatment without insurance. Check out our guide for Seasonal Allergies Without Insurance.
You likely have a COLD if:
- No itchy eyes
- Symptoms started suddenly, possibly with a sore throat
- Mucus started clear, then turned yellow or green over a few days
- Low-grade fever is possible
- Symptoms are following a clear 7–10 day arc and improving
You likely have a SINUS INFECTION if:
- Heavy facial pressure or pain, especially around the eyes and cheeks
- Thick, colored nasal discharge that isn’t clearing up
- Symptoms have lasted more than 10 days without meaningful improvement
- Reduced sense of smell
- Feeling of fullness in the face or discomfort in the upper teeth
- Symptoms appeared to improve, then got noticeably worse again
Consider This Scenario
It’s April 21st. You wake up sneezing. Eyes itching. Nose running. You’ve been congested since the weekend.
You take a Claritin. It helps – a little. Not completely.
By day 6, the sneezing has calmed down, but now you have thick pressure behind your eyes, and the mucus has turned yellowish. You feel more tired than usual, and the facial pressure is genuinely uncomfortable.
What happened?
You started with allergies, which is why the antihistamine gave partial relief. But the congestion from those allergies blocked your sinus drainage, and that created a secondary bacterial sinus infection. This is extremely common in spring, and it’s one of the main reasons untreated or undermanaged allergies can spiral into something more serious.
This is not a situation for another antihistamine. This is a situation for your primary care doctor.
When to See a Doctor
Over-the-counter remedies are appropriate for mild allergy symptoms and the early stages of a cold. But contact your primary care doctor if:
- Symptoms have lasted more than 10 days without improvement
- You have significant facial pain or pressure
- Your mucus is persistently thick and colored
- You develop a fever
- You’ve already tried antihistamines or decongestants, and they aren’t helping
- You want to know what you’re actually dealing with before taking more medication
For Aurora Primary Care members, this means a same-day or next-day call or message, we help you identify what’s going on before symptoms escalate into something harder to treat.
Why Getting This Right Matters in Spring
Every April in Maryland, pollen counts create a perfect storm.
Allergies flare. Congestion builds. Sinuses swell. Drainage gets blocked. Infections develop from what started as a simple immune reaction to tree pollen.
- People who manage their allergies early, with the right medications and a proper care plan, tend to avoid the sinus infection cascade entirely
- People who wait, self-treat incorrectly, or push through without care tend to end up needing more intensive treatment by mid-April
Primary care exists precisely for this kind of situation, the early evaluation that prevents the bigger problem downstream.
The Bigger Picture
It is completely understandable not to know which one you have. These three conditions can look very similar, even to experienced clinicians.
These three conditions are clinically similar enough that even experienced clinicians run through a structured checklist to differentiate them. The difference is that a doctor can evaluate your history, your symptom pattern, your seasonal triggers, and your response to prior treatment, and get you on the right path the first time.
Aurora Primary Care members get same-day access for exactly this kind of evaluation — and our membership costs less than most people think. See how it compares to your current coverage.
If you have been managing spring symptoms on your own for years without ever having a real conversation with a primary care doctor about your allergy pattern, that conversation is genuinely worth having.
At Aurora Primary Care, we’re not going to hand you a prescription and send you home. We want to understand your full picture and build a plan that keeps you well through April, May, and beyond.
We offer a Free Meet & Greet with Dr. Malhotra, no commitment, no pressure, to help you decide if our membership model is right for your healthcare needs.
Frequently Asked Questions
1. How do I know if I have allergies or a sinus infection?
Sinus infections are more likely when symptoms last more than 10 days, worsen after initial improvement, or include facial pain/pressure, fever, or heavy congestion. Allergies more often cause itchy eyes, sneezing, clear drainage, and a seasonal pattern.
2. Can allergies turn into a sinus infection?
Yes, and this is very common. When allergies cause significant nasal congestion, swollen tissues can block the sinus passages and prevent normal drainage. That environment becomes a breeding ground for bacteria, leading to a secondary sinus infection. Early allergy management, getting on the right medications before the season peaks, can often prevent this cycle from starting.
3. How long do allergy symptoms last compared to a cold?
A cold typically runs its course in 7–10 days and resolves on its own. Allergy symptoms persist as long as the trigger is present, during Maryland’s spring season, which can mean continuous exposure for weeks. If your symptoms have lasted more than 10 days without improving, see a doctor.
4. Do allergies cause fever?
No. Fever is not a symptom of allergic rhinitis. If you have classic allergy-type symptoms alongside a fever, you may have a cold, a sinus infection, or both. A doctor can help distinguish the cause and guide the right treatment.
5. Can I treat a sinus infection with antihistamines?
Antihistamines treat allergic responses; they will not resolve a bacterial sinus infection. Taking only antihistamines when you have sinusitis delays appropriate care and can allow the infection to worsen. If a sinus infection is suspected, a physician evaluation is needed to determine whether antibiotics or other treatments are appropriate.
6. What are the common spring allergy triggers in Maryland?
Maryland’s spring allergy season typically begins in late February through March and peaks in April with oak, hickory, ash, and maple pollen. Symptoms include a runny nose with clear mucus, frequent sneezing, itchy and watery eyes, nasal congestion, postnasal drip, and fatigue. High-pollen days are typically dry, warm, and windy days with low humidity.
7. When should I go to urgent care or the ER for sinus or allergy symptoms?
Most allergy and early sinus infection symptoms can be managed by your primary care doctor. Seek urgent or emergency care if you develop a high fever, severe headache, stiff neck, vision changes, significant swelling around the eyes, or any difficulty breathing; these may indicate a more serious complication that needs immediate attention.
8. Can a primary care doctor treat sinus infections, or do I need a specialist?
A primary care doctor can diagnose and treat the vast majority of sinus infections effectively. Referral to an ENT (ear, nose, and throat specialist) is typically considered for chronic or recurrent sinusitis, structural nasal issues, or cases where standard treatment has not been effective after multiple attempts.
9. How do I tell if it’s allergies or COVID-19?
Both can cause congestion, a runny nose, and fatigue. Key differences: COVID-19 is more likely to cause fever, body aches, chills, and loss of taste or smell. Allergies are far more likely to cause itchy eyes and sneezing, and will not cause a fever. If you are uncertain, a rapid antigen test is the quickest way to rule out COVID-19 before treating for allergies.
10. Is it worth seeing a doctor every year just for spring allergies?
Yes, particularly if symptoms significantly affect your quality of life, sleep, or work. A primary care doctor can review your pattern over time, adjust your treatment plan as your triggers or sensitivities change, assess whether allergy testing is appropriate, and help you avoid the common cycle of untreated allergies leading to sinus infections every spring.
Dr. Mudita Malhotra, MD, FAAFP, is the founder of Aurora Primary Care in Rockville, MD — a Direct Primary Care practice focused on accessible, personalized, and preventive medicine for individuals and families.