The internet should only be used as an adjunct to professional advice. Once you know what you are facing, THEN look for information. At the current rate of study, our knowledge base in the health field doubles about every 19 years. This means that changes and advances in our knowledge are happening at a faster rate than any one individual can possibly keep up with. This should be reflected in an explicit statement by the web author or a date on each web page.
Some sites are non-commercial hobby ventures.
Others are provided by non-profit organizations. Still others are by government agencies. There are even some sites that offer health-related information for a fee. The source of funding for a site should be explicitly stated. The internet is an easy source of fraudulent information that may be designed to collect money from unsuspecting consumers.