Can Black Mold in the Shower Kill You?
Even though black mold in the shower looks dangerous and can sometimes lead to unpleasant symptoms such as coughing, watery eyes and skin irritation, it is highly unlikely to kill you. Nonetheless, prolonged exposure to black mold at high levels can lead to more serious respiratory infections. Therefore, black mold in the shower should be addressed as soon as possible to maintain a healthy living environment.
What is Black Mold?
Black mold is a common name for a black or dark green fungus, which can contain a mixture of fungal species - the most common being Stachybotrys chartarum [1]. It thrives in warm environments that have a lot of moisture, which means that it is often found in showers, baths, kitchens, and basements. The fungus can thrive on a variety of surfaces, including on wood, dirt, or paper, and may become more plentiful in humid climates or if a humidifier is used indoors [1]. Black mold can release mycotoxins, which have caught the attention of home owners.
Is Black Mold Dangerous?
Although the name black mold may sound a bit ominous, black mold is known co-exist with humans relatively harmoniously and without significant health detriment and toxicity [2]. The predominant fungal species in black mold, Stachybotrys chartarum, has not been linked to any health conditions apart from allergies.
The most common reports of toxicity through black mold are developing a mold allergy, which comes with symptoms of a runny nose and coughing [1]. The risk of experiencing these symptoms is likely higher in people with reduced immune system activity, such as those with pre-existing dust allergies, asthma or taking immunity-suppressing therapy [3].
Despite the absence of life-threatening effects of black mold, all molds, regardless of color, should be removed from buildings and homes to maintain a healthy living environment [1].
Can Black Mold in the Shower Kill You?
Black mold, whether in the shower or elsewhere in the house can be toxic, although it is unlikely to be lethal. Most healthy individuals won't die from black mold exposure and it is unlikely to make them ill.
However, certain groups, such as very young or old people, those with compromised immune systems, and people with existing health conditions such as asthma, may be at a higher risk of illness or developing a mold allergy from toxic black mold[4].
As black mold can cause some unpleasant symptoms, you should remove the black mold as soon as possible. These symptoms of toxicity can include:
- itchy eyes,
- nose, throat,
- eczema,
- itching of the skin,
- sneezing or difficulty breathing.
Some individuals may also experience watery eyes [4]. In more severe cases, black mold can lead to a respiratory infection. However, the levels of mold in a household shower are unlikely to trigger this respiratory infection unless one has a compromised immune system [4]. For example in people with asthma, an allergic reaction to mold may trigger an asthma attack, symptoms of which would require inhalers [5].
Contrary to rumours, black mold does not cause psychological symptoms of brain fog or memory loss [2]. Furthermore, mold has not been linked to development of autoimmune conditions [6].
To summarise, while black mold is unlikely to kill you, it can cause symptoms of toxicity. Nonetheless, commercial tests for mycotoxins are more likely a marketing stunt than a severe toxicity concern [6]. Black mold and released mycotoxins are more likely to lead to allergy-like symptoms, including coughing, sneezing and itchiness. However, those with compromised immune systems or existing health conditions should be cautious and seek medical attention if they believe they have been exposed to black mold, as they are at a higher risk of developing a respiratory illness.