Other bloggers complain of weight loss or gain, sleep disorders, exhaustion and other maladies born of the nonstop strain of producing for a news and information cycle that is as always-on as the Internet.

To be sure, there is no official diagnosis of death by blogging, and the premature demise of two people obviously does not qualify as an epidemic. There is also no certainty that the stress of the work contributed to their deaths. But friends and family of the deceased, and fellow information workers, say those deaths have them thinking about the dangers of their work style.

The pressure even gets to those who work for themselves  and are being well-compensated for it.

“I haven’t died yet,” said Michael Arrington, the founder and co-editor of TechCrunch, a popular technology blog. The site has brought in millions in advertising revenue, but there has been a hefty cost. Mr. Arrington says he has gained 30 pounds in the last three years, developed a severe sleeping disorder and turned his home into an office for him and four employees. “At some point, I’ll have a nervous breakdown and be admitted to the hospital, or something else will happen.”

“This is not sustainable,” he said.

It is unclear how many people blog for pay, but there are surely several thousand and maybe even tens of thousands.

The emergence of this class of information worker has paralleled the development of the online economy. Publishing has expanded to the Internet, and advertising has followed.