This is called male.pattern baldness or androgenic alopecia. There are options for it. U can stop the progress and reverse it to an extent with medications and procedures.

Hair regrowth possible...You are suffering from hormonal changes causing Androgenetic alopecia causing hair fall. It's completely stoppable even regrowth of hair is possible with certain medications without any side effects. Treatment depends on the grade of hair loss. So, it's a must for diagnosing which grade, you are in for an effective treatment. Please  send more photos of your head, by direct online consultation for accurate diagnosis and proper treatment.

Based on your picture your density of hair is reduced significantly in the vertex and mid scalp. Can be Male pattern baldness. Start your treatment early for your hair. That can prevent further loss. Consult a nearby plastic surgeon or a dermatologist to assess you and start appropriate treatment as per final diagnosis. START EARLY !

I can understand your concern Get online consultation for proper guidance and treatment

This is androgenetic alopecia or male pattern hair loss where men lose hair from frontal and crown area. You can consult for the same and start treatment soon.

please take consultation for further evaluation and proper diagnosis

Take consultantion and discuss in detail

It's androgenetic alopecia You need to understand etiopathogenesis followed by duration of treatment. So consult online for the same.

Specific treatment available for complete reversal

Consult online for further treatment

No need to worry.specific treatment is available.it depends on severity of the disease . Complete medical history is required.. Pls do online consultation with Dermatologist for detailed prescription & guidance.