Symptoms range from mild fevers, to

Symptoms range from mild fevers, to a severe and potentially life threatening haemorrhagic (bleeding) disease.

Common symptoms of dengue fever include:

sudden fever
extreme tiredness
intense headache
muscle and joint pain
loss of appetite, vomiting, diarrhoea, abdominal pain, a metallic taste
red rash on arms and legs, itching, peeling of skin and hair loss
minor bleeding from nose and gums
Symptoms may last up to a week and can range from mild to severe. Most people recover.

Results (English) 3:

症状从轻微的发烧，到严重的和潜在的威胁生命的出血（出血）病。登革热的常见症状包括：突然发热极度疲劳剧烈头痛肌肉和关节疼痛丧失食欲，呕吐，腹泻，腹痛，金属味胳膊和腿上的红色皮疹，瘙痒，皮肤和头发脱落的脱皮轻微的鼻子和牙龈出血症状可能持续到一个星期，可以从轻微到严重的范围。大多数人恢复。