No Obstruction, No Lesion
Why Sebum Destruction Misses the Point in Acne
In Part 1, I challenged the idea that acne is a disease of excess sebum. This second piece goes further, because the logical consequence of that belief is now widespread in medical aesthetics: treatments and devices designed to aggressively suppress, damage or virtually eradicate sebaceous activity.
If sebum is framed as the enemy, its removal becomes the goal. That conclusion is convenient. It is also biologically flawed.
Acne lesions do not form in open follicles. Without obstruction, there is no closed environment in which acne can escalate. No blockage. No lesion.
For acne to develop, three conditions must coexist. The follicle must become obstructed. Sebum must be present within that closed space. Bacterial lipase must then act on trapped triglycerides. Remove any one of these conditions and the lesion cannot form.
Sebum reduction strategies address only one variable and not the decisive one.
In an open follicle, sebum drains. Oxygen tension remains unfavourable for pathogenic bacterial behaviour. Lipase-driven triglyceride degradation does not escalate. Inflammation does not amplify. This is why acne does not arise in open follicles, regardless of sebum output.
The pathology begins only when obstruction traps sebum.
Inside a blocked follicle, bacterial lipase degrades triglycerides into free fatty acids. These free fatty acids are highly inflammatory. Oxidative stress follows. Immune signaling escalates. The lesion forms. This sequence cannot occur without obstruction.
Reducing sebum production does not remove obstruction. It does not inhibit lipase activity. It does not prevent free fatty acid formation. It simply reduces substrate volume while leaving the pathological mechanism intact.
Sebum is not pathological by default. It is a functional component of barrier integrity, microbiome stability and follicular homeostasis. Treating it as something to be eradicated ignores its regulatory role and its interaction with microbial balance.
Driving sebum towards ritualised suppression or near elimination carries consequences. Barrier impairment, microbiome disruption, compensatory sebaceous dysregulation and increased inflammatory sensitivity are not theoretical risks. In acne-prone skin, they are predictable outcomes.
For those who promote sebum as the real enemy will inevitably push back in this. Let me say
Statement
“We see fewer lesions when sebum is reduced.”
Response
Reduced well yes less on the surface, but if it’s trapped under the comedonal plug then you will only be reducing surface shine and transient congestion. It does not mean that the pathological process has been addressed.
Statement
“Sebum feeds bacteria.”
Response
Sebum feeds many bacteria, good ones as well and does not cause acne. Lipase-mediated degradation of trapped triglycerides does. Without obstruction, that process does not escalate.
Statement
“These devices work in practice.”
Response
Many interventions appear effective while inflammation is temporarily suppressed. Relapse patterns, barrier compromise and increasing skin reactivity over time tell a different story. Sebum plus bacteria under a blockage is the target. Not sebum on the surface.
A mechanism-led approach asks a different question. Not how much sebum the skin produces, but what happens to sebum inside an obstructed follicle.
SkinMed protocols focus on maintaining or restoring follicular patency, protecting triglycerides from lipase-mediated degradation, converting bacterial activity into pH-driven antimicrobial control and reducing inflammatory amplification at source. The objective is not to remove sebum, but to stop it becoming inflammatory.
Where obstruction is established, professional intervention should open the follicle first, restore drainage and then modify follicular biochemistry. Clearing obstruction without addressing biochemistry is incomplete. Suppressing sebum without addressing obstruction is misguided.
Acne is not a disease of too much oil. It is a disease of sebum trapped in an obstructed follicle and biochemically transformed into an inflammatory signal.
Remove the obstruction, control the biochemistry and the lesion cannot form.
No obstruction. No lesion.
