You stand in front of the mirror in the morning, combing or styling your hair as usual. Suddenly the comb catches on something, or your fingertips brush against a small bump that wasn’t there before. Perhaps you’ve been going to the same barber for years, and during your haircut your barber says, “Sir, there’s a little growth here—it bleeds when the comb touches it, just so you know.”

It is in that very moment that, for many of us, that familiar, cold sense of worry sets in. The question “Could I have a mass on my head?” begins to echo in the mind.

Our hair is a wonderful covering that protects our head from the sun, cold, and external factors. But at the same time, it acts as a curtain that hides from our eyes whatever is happening underneath. For this reason, we usually notice changes, swellings, or spots on the scalp only by chance, or when they have grown quite large. I know very well the legitimate anxiety in the eyes of many patients who come to my clinic. The word “mass” sounds frightening, especially when paired with the head region. But I would like to begin by putting your mind at ease: the vast majority of these formations we encounter on the scalp are entirely benign, harmless, and extremely easy to treat.

So Why Do Swellings Form on Our Head?

Our scalp is one of the richest and most active regions of our body in terms of blood vessels, nerve endings, sweat glands, hair follicles, and sebaceous (oil) glands. In such an active and dense anatomical structure, it is entirely natural for small malfunctions to occur from time to time.

Among the most common conditions we encounter in our clinic are the epidermoid or sebaceous cysts, popularly known as “oil cysts.” These actually form as a result of the blockage of the sebaceous glands at the hair follicles. They are filled with a dense, cheese-like keratin material. They can often remain silently the same size for years. However, sometimes they can become infected and suddenly swell, redden, and become painful.

Another frequent visitor we see is the lipoma, that is, a fatty lump. These are soft and entirely innocent masses formed by the accumulation of fatty tissue under the skin, which slide slightly under your finger when you touch them. In addition to these, we also frequently encounter hemangiomas—red-purple vascular structures arising from the scalp’s rich vascular network—as well as warts and skin tags that catch and hurt when combing the hair.

Of course, there is also the other side of the coin. Especially in people whose hair has thinned or fallen out completely, being directly exposed to the sun’s harmful ultraviolet rays for many years increases the risk of skin cancer. More serious conditions may also arise, such as a long-standing innocent mole on your head changing in character, or basal cell carcinoma or melanoma appearing in the form of wounds that never heal and constantly scab over and bleed.

Why Should You See a Neurosurgeon?

Many of my patients ask me this question: “Doctor, this is ultimately a skin problem, isn’t it—why was I referred to a brain surgeon?” This is an entirely logical and valid question.

While many problems on the skin’s surface fall within the field of dermatology, when the subject is “masses” on the scalp, the expertise of neurosurgery comes into play. The reason for this is purely anatomical proximity. There is only a few millimeters of distance between our scalp and our skull bone. And just beneath the skull bone lie the protective membranes surrounding our brain.

Although some scalp masses may appear from the outside as merely a small swelling, beneath the skin they may have grown toward the skull bone, eroded the bone, and in very rare cases even formed a connection with the structures inside the skull. We neurosurgeons do not merely remove that mass aesthetically; we also evaluate the relationship of the mass with the bone and the brain membrane before the operation, protect the integrity of the skull during surgery, and safely manage the scalp’s intensely bleeding structure.

In Which Situations Should We Not Say “Wait and See”?

You certainly don’t need to rush to the emergency room for every swelling. But we should also know how to listen to our bodies. If that small swelling or mole on your head has visibly grown within the last few months, if you’ve noticed a darkening or mottling in its color (a mixing of black, navy, and brown shades), you should definitely see a specialist. Furthermore, wounds whose borders become irregular, that bleed on their own, that constantly scab over and never quite fully heal—or suddenly starting throbbing pain and inflamed discharge—are important warning signs telling us “don’t waste time.”

Is It a Treatment Process to Be Feared?

The phrase “surgical intervention” always sounds heavy, but the treatment of scalp lesions is most of the time quite comfortable. After a detailed examination and, if necessary, an imaging method such as ultrasound or MRI, we fully understand the structure of the mass.

The operation process is generally a safe procedure performed under local anesthesia (numbing only the area around the mass), which often does not even require a hospital stay. Most of the time, we remove these masses completely while chatting with our patients, without causing any pain. After the procedure, you can return to your home—even to your work—the same day.

Here is a detail I emphasize most and underline in bold in my personal practice: no matter how small or how “innocent” the mass appears, that piece removed from the body must be sent to the pathology laboratory. The eye can be deceived, but the microscope does not lie. A definitive diagnosis is made through pathology, and that chapter is closed securely, with no doubt left in our minds.

To summarize: there’s no need to lose sleep over every foreign mass your hand encounters among your hair. However, trying to live with that mass for years, saying “nothing will happen to it anyway,” can both bother you aesthetically and cause you to miss possible early diagnosis opportunities. If there is a change on your head that makes you suspicious, that catches your eye in the mirror, don’t delay. Getting completely rid of this worry with a small and correct touch is much easier than you think.

Stay healthy and safe.

Prof. Dr. Mehmet Şenoğlu

Neurosurgery Specialist, İzmir