It happens each year - more hair on brushes and drains once summer arrives. Dermatologists see it often: a shift in what comes out during washing or combing. Heat alters conditions across the scalp, whether through moisture buildup or sun exposure. Instead of an alarm, consider timing; cycles change with seasons. Shedding rises, yet regrowth follows for most. What feels sudden has roots in rhythm, not damage. Even sweat plays a role, mixing with natural oils in ways that loosen strands.
Heat brings more moisture from the body. On the head, tiny openings release fluid just as they do elsewhere on the surface. During warm periods, dampness gathers quickly - particularly alongside natural grease and particles floating in the air. Together, these substances form a layer that blocks root spaces, possibly causing discomfort or swelling. With continued exposure, anchors beneath strands grow less secure, raising the chances of loss.
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At times, imbalances in microbial populations take on key significance. When warmth meets dampness, the scalp offers favourable conditions - Malassezia thrives under such settings, tied closely to skin flaking and inflammation. Should balance shift, signs emerge: itching, noticeable cell loss, unease. Over time, ongoing disruptions impair the space where hair grows, gently altering the rhythm of follicle cycles.
Biological effects emerge under heat strain. Extended contact with intense warmth, along with strong sunlight, affects both hair strands and skin surface on the head. Protein integrity within strands tends to decline when struck by the sun's rays, often resulting in increased fragility, rough texture, and loss of moisture. Meanwhile, elevated conditions interfere with regular phases of development - shifting greater numbers into the resting state before release.
Summer habits often play a role in scalp issues due to extended time outdoors, lack of fluids, or irregular grooming patterns. Exposure to sun and sweat, when paired with aggressive washing products, tends to shift how the scalp functions. Skipping cleanses post-activity brings similar effects, even without strong formulas. Balance falters not only through excess but also through delay. Harsh shampoo strips protective layers; infrequent removal of buildup invites irritation. Each choice alters conditions beneath the surface.
Should shedding increase during warm months, attention shifts toward scalp health. A steady routine of mild washing supports balance without irritation. Product selection matters - formulations suited to individual needs perform better over time. When flakes appear, acting sooner prevents escalation. Persistent thinning prompts consultation, where assessment guides next choices. Underlying factors may emerge through examination, shaping personalised responses.
Dr Gaurang Krishna is a celebrity dermatologist and hair transplant expert - Medlink.
The opinions expressed in this article are those of the author and do not purport to reflect the opinions or views of THE WEEK.
