The hair bulb itself is nearly doubled back over the follicle in a growth shape resembling a golf club in:
Tightly curled hair
The hair bulb itself is nearly doubled back over the follicle in a growth shape resembling a golf club in the anagen phase of the hair growth cycle.
During the anagen phase, the hair bulb at the base of the hair follicle is actively dividing and growing, pushing the hair shaft upward and elongating it. The shape of the hair bulb during this phase resembles a golf club because it is enlarged and bulbous at the base, tapering down into a narrower shaft. This shape helps to anchor the hair firmly in the scalp and maintain its structural integrity as it grows.
Once the anagen phase is complete, the hair transitions into the catagen phase where it detaches from the hair bulb and undergoes a period of regression. Finally, in the telogen phase, the hair is shed and the hair follicle enters a resting period before beginning the growth cycle anew.
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