According to Eurostat's cause of death statistics boys and young men have significantly higher mortality not just from causes that could be attributed to risk behaviour - falls, drowning, accidents, overdose - but also from causes like infections, cancers, nervous system diseases, circulatory system diseases, metabolic diseases etc.

This discrepancy starts before the age 10 and continues past the age 24, but let's look at the numbers in the 15-19 age group. I have added selected external causes, at the bottom, for reference.

Cause of death Males (15-19) Females (15-19) Ratio
Infections & parasitic 69 44 1.7
Neoplasms (cancer) 568 390 1.5
Endocrine & metabolic 77 45 1.7
Nervous system 323 157 2.1
Circulatory system 242 153 1.6
Respiratory system 149 92 1.6
External causes
Toxicomania 14 11 1.3
Accidents 2511 742 3.4
Suicide 925 272 3.4
Assault 93 33 2.8

(Note that suicide is the second biggest cause of death in boys and young men, more about that in A man walks into a hospital...)

So why are boys dying of "natural" illnesses much more than girls? There is very little difference in occupation at this point, most teenagers are still attending schools. Could it still be related to risk behaviour like teenage smoking and drinking? Or hobbies like affinity to pyrotechnics, engines and chemicals? Or playing too much video games? Could the reason be that boys in this age group are slightly more overweight than girls? Personally, neither of those explanations seems plausible to me.

And what do we about it? The short answer: Nothing.

The long answer: We distort the facts and pretend that medicine is patriarchal. Here are top 4 Google results for "is western medicine male oriented?":