A bald spot can look very different depending on what’s causing it. Some appear as smooth, round patches the size of a coin. Others show up as gradual thinning where more and more scalp becomes visible over months or years. The skin inside the spot, the edges of the hair loss, and whether you see redness or flaking all point to different causes. Here’s what to look for.
Round, Smooth Patches: Alopecia Areata
The most recognizable type of bald spot is a sudden, round or oval patch of missing hair, typically about the size of a quarter. This is the hallmark of alopecia areata, a condition that affects roughly 2% of people worldwide at some point in their lives. The skin inside these patches usually looks normal: no redness, no rash, no flaking, no scarring. It’s just bare, smooth skin where hair used to be.
One telltale detail sits at the edges of these patches. You may notice short, broken hairs that are thinner at the base and wider at the tip, sometimes called “exclamation point” hairs. They look like tiny tapered stubs poking out of the scalp and signal that the hair loss is active. These patches can appear on the scalp, beard, eyebrows, or anywhere else hair grows. When hair eventually regrows, it often comes in white or gray initially before returning to its natural color over several months.
Gradual Thinning: Pattern Baldness
Pattern baldness looks nothing like the coin-sized patches of alopecia areata. Instead, you’ll notice a slow, progressive change. In men, it typically starts at the temples, where the hairline creeps back into an “M” shape. At the crown (the top-back of the head), thinning usually appears in a circular shape where more scalp gradually becomes visible. Over time, these two areas of loss can expand and merge, creating a “U” shape of remaining hair around the sides and back of the head.
The progression follows a well-documented seven-stage scale. Early stages show only slight recession at the temples, which many people don’t even notice. By the middle stages, the hairline recession deepens and a distinct bald area forms at the crown. In advanced stages, the hair between the temples and crown thins completely, leaving only a band of hair around the sides. The scalp itself looks healthy throughout this process. There’s no inflammation, scarring, or unusual texture. The hair simply gets finer and shorter with each growth cycle until it stops growing visibly.
Scaly, Red, or Itchy Patches: Fungal Infection
If a bald spot comes with redness, scaling, or itching, a fungal scalp infection (tinea capitis) is a likely culprit, especially in children. These spots look inflamed. You’ll see swollen red patches, dry scaly skin, and sometimes painful, boggy areas on the scalp.
A distinctive sign is the “black dot” pattern. When the fungus causes hair shafts to break right at the scalp surface, the remaining stumps look like tiny black dots scattered across the patch. This is very different from the smooth, clean skin of alopecia areata or the gradual transparency of pattern baldness. Fungal bald spots are often itchy and can spread to other areas of the scalp if untreated.
Shiny, Scarred Skin: Permanent Hair Loss
Some bald spots have a distinctly different texture. In scarring alopecia, the skin where hair used to grow looks smooth and shiny, almost waxy. The critical difference from other types of hair loss is that the tiny openings where hair follicles normally sit are closed or absent. Healthy scalp skin, even in a bald area, has visible pores. In scarring alopecia, those pores disappear because the follicles have been permanently destroyed and replaced with scar tissue.
You might also notice signs of past or ongoing inflammation around the edges, including redness or slight discoloration. This type of hair loss is permanent because the follicles themselves are gone, unlike alopecia areata or telogen effluvium where the follicles remain intact beneath the surface.
Diffuse Shedding: Telogen Effluvium
Not all hair loss creates a distinct bald spot. Telogen effluvium causes widespread thinning across the entire scalp rather than localized patches. You might notice more hair in your brush, in the shower drain, or on your pillow, and your ponytail may feel thinner. But the scalp itself should look completely healthy: no rash, no itching, no burning, no flaking. This type of shedding is typically triggered by stress, illness, surgery, or hormonal changes and usually resolves on its own within several months.
How to Tell a Bald Spot From a Cowlick
Many people mistake their natural hair whorl for early hair loss. Everyone has at least one whorl, usually at the crown, where hair grows in a circular pattern. Because the hair fans outward from a central point, the scalp can look more visible there, especially under direct overhead light. This is normal and doesn’t indicate thinning.
The key difference is density. In a cowlick, the hair is still thick and full; it’s just growing in a spiral direction that exposes a sliver of scalp. In a true bald spot, the hair is either missing entirely or noticeably finer and sparser, and the area of visible scalp tends to widen over time. If you’re unsure, take a photo every few months under the same lighting. A cowlick stays the same. A bald spot gets bigger.
Quick Visual Comparison
- Alopecia areata: Round, coin-sized, smooth skin, no redness or flaking, short tapered hairs at the edges
- Pattern baldness: Gradual thinning at temples or crown, healthy scalp, “M” or “U” shaped hairline over time
- Fungal infection: Red, scaly, itchy patches with possible black dots where hair shafts broke off at the surface
- Scarring alopecia: Shiny, smooth skin with no visible hair follicle openings, possible discoloration
- Telogen effluvium: Overall thinning rather than a patch, healthy-looking scalp, excessive shedding
- Normal cowlick: Circular growth pattern at the crown, full hair density, doesn’t change over time
The most important things to notice when evaluating a bald spot are its shape (round patch vs. diffuse thinning vs. receding line), the condition of the skin (smooth vs. red vs. scaly vs. shiny), and whether it appeared suddenly or developed gradually. These three details narrow down the cause considerably and help determine whether the hair loss is likely temporary or permanent.