Pneumonitis

Overview

Pneumonitis is an inflammation of the lung tissue. Although pneumonia is technically a type of pneumonitis because the infection causes inflammation in the lung tissue, healthcare providers typically use the term “pneumonitis” to refer to noninfectious causes of lung inflammation.

In addition to affecting breathing, pneumonitis can result in additional physical symptoms. Pneumonitis is frequently caused by airborne irritants from your hobbies or place of employment. The condition can also result from multiple medications and some cancer treatments.

The inflammation caused by pneumonitis comes in multiple types of inflammation. Among them are:

• Acute: The onset of inflammation is sudden, and it diminishes quickly.
• Subacute: The progression of inflammation is slow and steady.
• Chronic: Long-term and persistent inflammation develops from inflammation.

The following types of pneumonitis includes:

• Acute interstitial pneumonitis: Your symptoms worsen swiftly as acute interstitial pneumonitis occurs suddenly.
• Chemical pneumonitis: When someone breathes in chemicals found in products used at home or at work, such as chemicals used in imaging tests, chlorine gas, insecticides, gasoline, and smoke, they might develop chemical pneumonitis.
• Hypersensitivity pneumonitis: When you breathe in (inhale) allergens such as dust, mold, bacteria, or microscopic scales from animal skin, hair, or feathers (dander), you may develop hypersensitivity pneumonitis.
• Radiation pneumonitis: Radiation pneumonitis may develop following cancer treatment with radiation therapy.

The primary indicators of pneumonitis often involve difficulty breathing, often coupled with a persistent dry cough lacking mucus production. Receiving a diagnosis typically requires specialized testing. The primary objectives of treatment are to diminish inflammation and steer clear of irritants.

Symptoms

The primary signal of pneumonitis is typically shortness of breath, often accompanied by a dry cough. Over time, untreated pneumonitis can progress to chronic pneumonitis, potentially leading to lung scarring (fibrosis) if left undetected or untreated.

Chronic pneumonitis signs and symptoms include:

• Bluish discoloration or cyanosis
• Chest pain.
• Dry cough
• Fatigue
• Loss of appetite
• Shortness of breath or dyspnea.
• Unintentional weight loss

Anytime you have trouble breathing, regardless of the reason, seek medical attention.

Causes

Pneumonitis has been related to several irritants, from chemotherapy medications to fungi that are airborne. However, in the majority of cases, the exact agent that causes the inflammation remains unknown.

An irritating chemical can lead to inflammation of the small air sacs in your lungs called alveoli, which can result in pneumonitis. Oxygen cannot easily enter the circulation through the alveoli due to this inflammation.

Pneumonitis can have a wide range of potential causes. Common causes include:

• Animal: Allergens found in animal fur, feathers, and skin have the potential to cause inflammation. One typical way to get pneumonitis is by being around feathers or bird excrement.
• Bacteria and molds: Lung inflammation can result from exposure to certain molds and bacteria on a regular basis. Certain types of mold-related pneumonitis have been dubbed “hot tub lung” or “farmer’s lung.” Examples of molds are the ones that develop on sugar cane, hay, straw, cereals, and cheese.
• Medications: Pneumonitis may be brought on by a number of medicines, including some antibiotics, certain chemotherapy agents, and therapies that regulate heart rate. Aspirin overuse can result in pneumonitis.
• Radiation treatments: Pneumonitis can occur in certain patients receiving chest radiation treatment, such as those treating lung or breast cancer. In order to get ready for a bone marrow transplant, whole-body radiation treatment might sometimes result in pneumonia.

Risk factors

The following may increase the risk of pneumonitis.

• Work or hobbies: The following occupations and hobbies have increased risks of pneumonitis:
  • Farming: Workers in a number of agricultural occupations are exposed to pesticides and aerosolized mists. One of the most frequent ways that moldy hay causes occupational pneumonitis is by airborne particle inhalation. When hay and grain are being harvested, mold particles might also be inhaled.
  • Bird handling: Individuals who deal with poultry and those who raise or breed pigeons are frequently in contact with feathers, excrement, and other elements that can lead to pneumonitis.
  • Hot tubs and humidifiers: Pneumonitis can be brought on by moldy hot tub environments because the bubbling movement creates an inhalable mist. Humidifiers in homes are another typical source of mold. Mold and bacteria can grow in an unclean environment and infiltrate you through the mist.
• Cancer treatment: Both radiation treatment to the lungs and some chemotherapy medications can result in pneumonitis. The chance of developing irreversible lung disease is increased by the two together.