Areas of the scalp. F-Frontal / M-Mid frontal / T-Temple / V-Vertex.

Recognizing the Early Warning Signs of Hair Loss:
The onset of hair loss can manifest through a variety of noticeable symptoms:

A marked increase in hair shedding: This could present as a thinning of the hair overall, a receding hairline that gradually moves back from the forehead, or the formation of noticeable bald patches on the scalp.

Accumulation of excessive hair: Regularly observing a significantly higher quantity of hair in your hairbrush after use, in the shower drain after washing, on your clothes throughout the day, or on your pillow after sleeping, compared to your normal hair loss patterns.