
The presence of bacteria, the intensity of a breakout, and personal hygiene practices can all contribute to the distinctive scent of a pimple. While an occasional stinky pimple is not uncommon, some scents can signal more serious underlying skin issues. For instance, if your pimple smells like cheese, it may be due to the presence of an epidermoid cyst, a noncancerous bump under your skin. This type of cyst contains a foul-smelling, yellowish, cheese-like material.
| Characteristics | Values |
|---|---|
| Cause | Dead skin cells accumulate deep in the skin and don't slough off as they should. |
| Occurrence | Epidermoid cysts, a noncancerous bump under the skin. |
| Cyst Contents | A thick, yellow substance made of the protein keratin that has a cheesy texture. |
| Cyst Formation | Blocked hair follicles, traumatic injuries, skin damage, or irritants. |
| Treatment | Anti-inflammatory injections, draining the cyst, or surgical excision. |
| Prevention | Avoid popping or squeezing pimples, as this can push bacteria deeper into the skin. |
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What You'll Learn

Epidermoid cysts
If your pimple smells like cheese, it could be due to an epidermoid cyst. These cysts are harmless growths that occur due to a blocked hair follicle. They contain a soft, cheese-like substance known as keratin, a protein secreted by epidermal cells. While epidermoid cysts are typically painless and do not require treatment, they can occasionally become inflamed or infected and, rarely, develop into skin cancer.
The main symptom of an epidermoid cyst is a lump, which can vary in size from tiny bumps to growths larger than a golf ball. These cysts can appear anywhere on the body but are typically found on the back, chest, shoulders, and upper arms. They may also develop due to an injury or irritation.
If you suspect you have an epidermoid cyst, it is important to see a healthcare professional for a correct diagnosis. A doctor will be able to examine the lump and determine the next steps. While the complete surgical excision of the cyst is typically the most effective treatment, it is not always necessary.
It is important to note that the smell associated with acne is caused by an interplay of factors, including the presence of bacteria, the intensity of the breakout, and personal hygiene practices. While proper treatment can help eliminate the odour, it is always recommended to consult a dermatologist for advice and treatment options.
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Bacteria and poor hygiene
Poor hygiene practices can influence the smell of your skin. While acne is not a direct result of poor hygiene, improper hygiene practices can influence the odour of your skin.
Bacteria are a key factor in the formation of odour and acne. The bacteria C. acnes is known to cause acne and other skin infections. As these bacteria feed on the matter within your skin, they produce byproducts that sometimes include sulfur compounds, which can emit a pungent smell of garlic, onions, or rotten eggs. The severity of your acne can also influence its odour. As acne progresses, it creates a more favourable environment for bacteria to thrive and produce their own set of smelly substances.
Popped pimples can emit a specific odour. When you pop a pimple, the invading bacteria will enter other pores and result in further infection. Therefore, it is important to avoid popping or squeezing pimples, as this can push bacteria deeper into the skin.
If your acne has a discharge that smells like cheese, it is likely due to an epidermoid cyst, a noncancerous bump under your skin. Epidermoid cysts develop when dead skin cells accumulate deep in the skin and do not slough off as they should. These cysts typically consist of a thick, yellow substance made of the protein keratin, which has a cheese-like texture and can sometimes become inflamed or infected.
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Acne conglobata
If your pimple smells like cheese, it may be due to the presence of an epidermoid cyst. These cysts can contain a foul-smelling, yellowish, cheese-like material called keratin. They are typically harmless and don't require treatment. However, they can sometimes become inflamed, infected, or even develop into skin cancer, so it's important to see a healthcare professional for a correct diagnosis.
Now, let's discuss Acne Conglobata (AC), an uncommon and unusually severe form of acne. It is characterised by interconnecting comedones, cysts, inflammatory nodules, and deep burrowing abscesses. AC usually presents with tender, disfiguring lesions on the face, shoulders, back, chest, upper arms, buttocks, and thighs. The comedones often occur in groups of two or three, and the cysts contain foul-smelling, purulent material that is discharged on the skin surface. AC causes significant scarring and inevitably leads to disfigurement. It can occur in isolation or alongside systemic inflammatory conditions such as SAPHO syndrome, PAPA syndrome, or PASH syndrome. The primary cause of AC remains unknown, but it is believed to be associated with changes in reactivity to Cutibacterium acnes and exposure to certain triggers. AC is challenging to manage with over-the-counter medications and often requires referral to a dermatologist for specialised care.
The exact cause of Acne Conglobata is not fully understood, but several factors have been identified as potentially contributing to its development. Chromosomal defects, such as XYY karyotype abnormalities, are thought to play a role in severe forms of AC. Additionally, changes in reactivity to Cutibacterium acnes, exposure to halogenated aromatic hydrocarbons, ingestion of halogens, androgens, and anabolic steroids may trigger AC in predisposed individuals. Childhood obesity has also been identified as a potential risk factor for early-onset AC. AC affects males more frequently than females, with white men being more susceptible.
The treatment of Acne Conglobata aims to manage the severe acne and reduce the risk of scarring. Due to the complexity and severity of AC, it typically requires specialised care from a dermatologist. Treatment options may include prescription-strength topical and systemic medications, such as antibiotics. Surgical excision of the cysts while keeping the cyst wall intact can also be considered. It is important to note that AC is a chronic inflammatory disease, and early consultation with a healthcare professional is crucial for proper evaluation and management of the condition.
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Other serious skin issues
Skin diseases are conditions that affect the skin and cause rashes, inflammation, itchiness, or other skin changes. Some skin conditions may be genetic, while others may be caused by lifestyle factors. While most skin disorders are minor, some can indicate a more serious issue. Here are some other serious skin issues:
Cellulitis
Cellulitis is a bacterial skin infection that can develop on any part of the skin. It typically appears on one lower leg in adults and on the face or neck in children. It is characterised by a scaly, reddish patch of skin that progresses to a raised bump. The skin may feel hot and tender to the touch, and fever, chills, and red streaking from the rash might indicate a serious infection requiring immediate medical attention.
Squamous Cell Carcinoma
Squamous cell carcinoma is a type of skin cancer that can appear anywhere on the body as a mole with irregularly shaped edges, asymmetrical shapes, and multiple colours. It may also cause a growth that bleeds easily, doesn't heal, or reappears after healing.
Melanoma
Melanoma is another type of skin cancer that often appears as a changing or growing mole. In people with darker skin, melanoma may appear in areas less exposed to the sun and may be larger than a pencil eraser.
Lupus
Lupus is an autoimmune disease that can cause a classic butterfly-shaped rash across the cheeks and bridge of the nose, worsening with sun exposure.
Cold Sores
Cold sores are tiny, painful, fluid-filled blisters caused by the herpes simplex virus (HSV-1). They are contagious and often appear in clusters on or around the lips.
Contact Dermatitis
Contact dermatitis is an inflammatory skin condition caused by an immune response to irritants or allergens that come into contact with the skin. It results in rashes that are inflamed, usually discoloured, and uncomfortable.
It is important to consult a healthcare professional for proper diagnosis and treatment of any skin concerns.
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Treatment options
If your pimple smells like cheese, it is likely due to the presence of an epidermoid cyst. These cysts can contain a foul-smelling, yellowish, cheese-like material known as keratin. Epidermoid cysts are harmless growths that occur due to blocked hair follicles. They are typically painless and do not require treatment. However, they can sometimes cause distress and become inflamed or infected. In rare cases, they can even develop into skin cancer.
If you have a smelly pimple, it is important to receive a proper diagnosis and appropriate treatment. Consulting a dermatologist is the best course of action, as they can offer expert advice tailored to your specific skin condition. Treatment options for pimples that smell like cheese due to epidermoid cysts include:
- Oral medications: Your dermatologist may prescribe oral medications such as antibiotics or steroids to help manage the symptoms and treat the infection.
- Topical treatments: Topical treatments, such as prescription-strength acne treatments or lotions, can be used to treat the affected area directly.
- Anti-inflammatory injections: If the cyst becomes inflamed or painful, your dermatologist may treat it with anti-inflammatory injections to reduce swelling and discomfort.
- Drainage: In some cases, the dermatologist may decide to drain the cyst to release the built-up fluid and reduce pressure.
- Surgical excision: The most effective treatment for epidermoid cysts usually involves the complete surgical removal of the cyst while keeping the cyst wall intact.
- Alternative therapies: Depending on your specific case, your dermatologist may recommend alternative therapies or home remedies to complement the medical treatments.
It is important to refrain from popping or squeezing the cyst yourself at home, as this can cause further damage and increase the risk of infection and scarring. Always consult a healthcare professional for a correct diagnosis and treatment plan.
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Frequently asked questions
If your pimple smells like cheese, it may be due to the presence of an epidermoid cyst. These cysts can contain a foul-smelling, yellowish, cheese-like material.
Epidermoid cysts are usually harmless, slow-growing, noncancerous bumps that appear under the skin. They are caused by a blockage of the hair follicle, which causes a cyst to form.
The most effective treatment for smelly pimples is to visit a dermatologist, who can perform a proper assessment and determine the best course of action.

























