What causes sudden hair loss in males?

I ignored my sudden hair thinning thinking it was just seasonal, but it turned out to be male pattern baldness accelerated by a severe vitamin D and B12 deficiency. I regret not seeing a doctor earlier when I could have saved more hair. Go see a dermatologist immediately.

Sudden shedding in guys is often triggered by physical trauma to the body, like extreme dieting, overtraining, or a major infection. Make sure you are eating enough proteins and healthy fats, and keep your stress in check with regular light exercise. A dermatologist can easily diagnose if it's stress-related or genetic.

I agree with others, high stress and nutritional deficiencies are major culprits. Getting a basic thyroid and vitamin blood panel done is the best first step.

I tried all kinds of herbal oils and onion juice when my hair started falling out rapidly, but nothing worked because the root cause was high work stress and bad nutrition. Home remedies are good for conditioning, but sudden male hair loss needs a doctor's checkup for scalp health and blood tests.