Sinusitis: Acute or Chronic, and What Really Helps

At a glance

What is it? An inflammation of the lining of the nose and paranasal sinuses, medically rhinosinusitis.
Most common cause Viruses, usually in the context of a cold. It almost always heals on its own.
Acute or chronic? Acute under 12 weeks, chronic from 12 weeks. This decides the treatment.
Antibiotics? Usually not needed, as the cause is almost always viral.
Important warning Use decongestant nasal spray only briefly, otherwise a rebound effect can set in.
ICD-10 J01 (acute), J32 (chronic)

What is sinusitis?

With sinusitis, the lining of the nose and the paranasal sinuses is inflamed. Because both are almost always affected together, doctors speak of rhinosinusitis. The paranasal sinuses are air-filled spaces in the skull, for example in the forehead and cheeks, that are connected to the nose.

When the lining swells, the secretion can no longer drain and builds up. This causes the typical pressure in the face. The vast majority of sinus infections develop in the context of a cold, that is they are caused by viruses and heal on their own. This is important for the question of what really helps.

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Acute or chronic? The important difference

For treatment, one distinction is decisive that many guides skip over:

  • Acute rhinosinusitis: it lasts less than twelve weeks and usually follows a cold. As a rule it clears up on its own within two to three weeks.
  • Chronic rhinosinusitis: here the symptoms last twelve weeks or longer. Sometimes nasal polyps form. This form belongs in specialist care (ENT) and is treated differently from the acute form.

Why this matters: an acute inflammation usually needs only some patience and symptom relief. A chronic one, by contrast, should be investigated, because things like allergies, anatomical features or polyps can be behind it.

Symptoms

Typical symptoms are:

  • a blocked nose and restricted nasal breathing. More on this: Blocked nose.
  • pressure or pain in the face, for example over the cheeks, the forehead or behind the eyes, often worse on bending forward.
  • a runny nose with clear or thick, yellowish to greenish secretion.
  • a reduced sense of smell.
  • sometimes headache, cough, pressure on the ears or toothache in the upper jaw.
A common myth: green secretion Yellow-green nasal secretion does not automatically mean that bacteria are involved and an antibiotic is needed. This colour also occurs with a perfectly ordinary viral inflammation.

Causes

The most common cause of acute sinusitis is viruses, usually in the context of a cold. Only rarely does an additional bacterial infection occur. An inflammation can also be encouraged by:

  • allergies, for example hay fever.
  • anatomical features such as a deviated nasal septum or narrow drainage pathways.
  • nasal polyps.
  • smoking and dry air.

Treatment: what really helps

With the acute, viral form, the main aim is to ease the symptoms while the inflammation settles on its own. The following tends to help:

  • nasal rinses with saline and saline nasal sprays, which loosen the mucus and moisten the nose.
  • decongestant nasal sprays (for example with xylometazoline), but only briefly. The reason is in the next section.
  • steam inhalation with warm water vapour.
  • pain and fever-reducing medicines as needed, such as ibuprofen or paracetamol.
  • corticosteroid nasal sprays, which can dampen the swelling, above all when an allergy plays a part.
  • drinking plenty and giving yourself rest.

Certain herbal preparations have also shown a soothing effect in studies. With the chronic form, other measures come first, above all corticosteroid nasal sprays over a longer period, treating allergies and, in some cases, surgery. This is managed by the ENT practice.

The nasal spray trap

Decongestant nasal sprays work quickly: they make the lining shrink, and the nose is clear at once. But that is exactly what makes them tricky.

If they are used regularly for longer than about a week, the lining gets used to them. As the effect wears off, it swells up more than before, and the nose is blocked again. You reach for the spray once more, and a cycle begins that can lead to dependence. Doctors call this medication-induced rhinitis, or rhinitis medicamentosa.

How to avoid the trap:

  • use decongestant sprays for no more than about five to seven days in a row.
  • for longer use, saline sprays or nasal rinses are suitable, as they do not cause dependence.
  • if you can no longer manage without the spray, talk to your doctor about coming off it.

More on the active ingredient: Xylometazoline.

Do I need antibiotics?

The short answer: usually not. Since the vast majority of sinus infections are caused by viruses, antibiotics generally do not help and are not needed. They barely shorten the typical course, but they can cause side effects and promote resistance.

An antibiotic is only considered in certain situations, for example:

  • with severe symptoms, a high fever (around 38.5 degrees Celsius or more) or severe facial or head pain.
  • when the symptoms clearly worsen again after an initial improvement.
  • with signs of complications (see the next section).
  • in people at particular risk, for example with a weakened immune system or severe chronic conditions.

If an antibiotic is needed, amoxicillin is usually the first choice. The decision is made by the doctor, not by the colour of the nasal secretion.

Medication plan

If a medicine is needed after all: brite keeps you on track.

Whether a prescribed antibiotic, a steroid nasal spray or your allergy medicine: brite reminds you of every use, warns about interactions and keeps track of how long you have been using your decongestant spray.

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When to see a doctor

With a simple, acute sinus infection you usually do not need to see a doctor straight away. But you should seek medical advice:

  • when the symptoms do not improve after about ten to fourteen days or get worse.
  • when the symptoms last twelve weeks or longer or keep coming back, as this raises the suspicion of a chronic form.
  • with severe pain or a high fever.
Get medical help at once Swelling or redness around the eye or on the forehead, vision problems or double vision, a protruding eye, a stiff neck or severe headache with drowsiness or confusion can point to a rare but dangerous complication. In that case get medical help at once or call the emergency number (112, in the US: 911).

Keep the overview with brite

Whether a decongestant spray, a steroid nasal spray or a prescribed antibiotic: brite helps you keep the overview and remember every use.

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  • Keep track: see how many days you have been using your decongestant spray.
  • Interaction check: see at a glance whether your medicines work well together.
  • Medication plan: always up to date and ready for your next appointment.
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Frequently asked questions

An acute, viral form usually clears up on its own within two to three weeks. If the symptoms last twelve weeks or longer, it is called a chronic form, which should be assessed by a doctor.

Usually not at all, as the cause is almost always viral. An antibiotic is only considered with severe symptoms, a high fever, a clear worsening, signs of complications or in people at particular risk.

No. Yellow-green secretion also occurs with a perfectly ordinary viral inflammation. The colour alone is not a reason for an antibiotic.

For no more than about five to seven days in a row. With longer use, a rebound effect with increased swelling can set in, called medication-induced rhinitis (rhinitis medicamentosa). For longer use, saline sprays are suitable.

Nasal rinses with saline, steam inhalation and, for a short time, a decongestant spray. Corticosteroid nasal sprays can also dampen the swelling, above all with an allergic component.

The acute form lasts less than twelve weeks and usually follows a cold. The chronic one lasts twelve weeks or longer, can come with nasal polyps and belongs in specialist care.

The cold viruses that trigger it can be passed on, for example through droplets. Whether this leads to a sinus infection, however, depends on the individual person.

When the symptoms do not improve after about ten to fourteen days, last a long time or keep coming back, or with severe pain, a high fever or warning signs such as swelling around the eye. The latter need help at once.

Related topics

Quellen

  1. DGHNO-KHC und DEGAM: S2k-Leitlinie „Rhinosinusitis“ (AWMF 017-049 und 053-012). register.awmf.org/de/leitlinien/detail/017-049
  2. IQWiG / gesundheitsinformation.de: Informationen zur Nasennebenhöhlenentzündung. gesundheitsinformation.de
  3. EPOS: European Position Paper on Rhinosinusitis and Nasal Polyps. rhinologyjournal.com
  4. HNO-Ärzte im Netz (Deutscher Berufsverband der HNO-Ärzte): Patienteninformationen. hno-aerzte-im-netz.de
  5. DGHNO-KHC (Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde): Patienteninfos. hno.org
Important note: This article is for general information and does not replace medical advice, diagnosis or treatment. Whether and how sinusitis is treated depends on your individual situation and should be discussed with a doctor if symptoms persist or are severe. Last updated: June 2026.