What are the signs and symptoms of Dengue Fever?

A symptom is something the patient feels or reports, while a sign is something that other people, including the doctor detects. A headache may be an example of a symptom, while a rash may be an example of a sign.

As there are different severities of dengue fever, the symptoms can vary.

Mild Dengue Fever - symptoms can appear up to seven days after the mosquito carrying the virus bites, and usually disappear after a week. This form of the disease hardly ever results in serious or fatal complications. The symptoms of mild dengue fever are:

• Aching muscles and joints
• Body rash that can disappear and then reappear
• High fever
• Intense headache
• Pain behind the eyes
• Vomiting and feeling nauseous

Dengue hemorrhagic fever (DHF) - symptoms during onset may be mild, but gradually worsen after a number of days. DHF can result in death if not treated in time. Mild dengue fever symptoms may occur in DHF, as well as the ones listed below:

• Bleeding from your mouth/gums
• Nosebleeds
• Clammy skin
• Considerably damaged lymph and blood vessels
• Internal bleeding, which can result in black vomit and feces (stools)
• Lower number of platelets in blood - these are the cells that help clot your blood
• Sensitive stomach
• Small blood spots under your skin
• Weak pulse

Dengue shock syndrome - This is the worst form of dengue which can also result in death, again mild dengue fever symptoms may appear, but others likely to appear are:

• Intense stomach pain
• Disorientation
• Sudden hypotension (fast drop in blood pressure)
• Heavy bleeding
• Regular vomiting
• Blood vessels leaking fluid
• Death

 source: http://www.medicalnewstoday.com/articles/179471.php