How to clinically diffrentiate between chikunguniya&dengue?

how to clinically diffrentiate between the non haemmoragic dengue fever&chikunguniya

Symptoms of Dengue Fever
1) Sudden onset of high fever, which may last two to nine days.

2) Severe headache mostly in the forehead

3) Joint and muscle pain, and body aches

4) Pain behind the eyes which worsens with eye movement

5) Nausea or vomiting of coffee coloured matter

Recognition of Dengue Hemorrhagic Fever and shock Symptoms similar to Dengue fever, plus any one or a combination of the following:

1) Severe and continuous pain in the abdomen

2) Bleeding from the nose, mouth, skin bruising

3) Frequent vomiting with or without blood

4) Black stools like coal tar

5) Excessive thirst (dry mouth)

6) Pale, cold skin

7) Weakness

8) Skin rashes maculopapular rash or red tiny spots on the skin, called Petechiae.

Symptoms of Chikungunya

The symptoms of Chikungunya are very similar to those of dengue fever, except that there is no hemorrhagic or shock syndrome form. The incubation period is usually 1-12 days- that means the disease manifests 1 to 12 days after the bite of the mosquito. Chikungunya virus (CHIKV) infection can cause a debilitating illness characterized by high fever which can reach up to 104 degree Fahrenheit. There will be a sudden onset of flu-like symptoms, including severe headache, chills, rash, fatigue, nausea, vomiting, muscle pain and joint pain. The normal symptoms persist usually upto 3 days but in a few cases, they may be upto 2 weeks. The joints of the extremities will become swollen and painful to touch and because of this, the disease has been classified among the Arthritic Viruses. Platelet Count in the body decrease till the disease persist. A condition known as Nuetropenia occurs at times. It is a condition in which the antibodies destroy the nuetrophils which are important white blood cells that help fight infection. Children, pregnant women and person under stress will be prone for more serious form of the complications

chikunguniya doesn't have haemorrhagic crisis.
chikunguniya has severe arthritis.