Under Perens' definition, open source describes a broad general type of software license that makes source code available to the general public with relaxed or non-existent copyright restrictions.
1 Illnesses such as the flu or colds. Home treatment of your flu and cold symptoms usually will relieve lightheadedness. 2  Vomiting, diarrhea, fevers, and other illnesses that cause dehydration.  Very deep or rapid breathing (hyperventilation).
Low blood pressure (hypotension) Low blood pressure, or hypotension, can make you feel lightheaded and dizzy. Anemia, chronic disease Anemia of chronic disease (ACD) can cause fatigue, pale skin, weakness, dizziness, headache and more.