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).
Anemia , a lack of red blood cells, can cause fatigue, pale skin and gums, brittle nails, irritability, and more. Acute kidney failure is sudden and can cause swelling, frequent dark urination, fatigue, nausea and more. Anemia, a lack of red blood cells, can cause fatigue, pale skin, weakness, dizziness, headache and more. Anemia of chronic disease (ACD) can cause fatigue, pale skin, weakness, dizziness, headache and more. Labyrinthitis, an infection and swelling in the inner ear, and may cause vertigo or hearing loss.