irritability

fever, headache, nausea, weakness

Influenza, commonly known as the flu, is an infectious disease of birds and mammals caused by an RNA virus of the family Orthomyxoviridae (the influenza viruses). In humans, common symptoms of influenza infection are fever, nausea, vomiting, sore throat, muscle pains, severe headache, coughing, and weakness and fatigue. In more serious cases, influenza causespneumonia, which can be fatal, particularly in young children and the elderly. Sometimes confused with the common cold, influenza is a much more severe disease and is caused by a different type of virus. Similarly, the unrelated gastroenteritis is sometimes called "stomach flu" or "24-hour flu". 

cough, cough wet, fever, runny nose

Acute viral nasopharyngitis, often known as the common cold, is a mild viralinfectious disease of the upper respiratory system (nose and throat). Symptoms include sneezing, sniffling, runny nose, nasal congestion; scratchy, sore, or phlegmy throat; coughing; headache; and tiredness. Colds typically last three to five days, with residual coughing lasting up to three weeks. It is the most common of all human diseases, infecting adults at an average rate of 2?4 infections per year, and school-aged children as many as 12 times per year. Infection rates greater than three infections per year per person are not uncommon in some populations. Children and their parents or caretakers are at a higher risk, possibly due to the high population density of schools and the fact that transmission to family members is highly efficient. ... 

cough, cough wet, difficulty sleeping, runny nose

Acute viral nasopharyngitis, or acute coryza, usually known as the common cold, is a highly contagious, viral infectious disease of the upper respiratory system, primarily caused by picornaviruses or coronaviruses. ... 

headache, nausea, vision problems, vomiting

Migraine is a painful neurological condition, of which the most common symptom is an intense and disabling episodic headache. Migraine headaches are usually characterized by severe pain on one or both sides of the head. Absent serious head injuries, stroke, and tumors, the recurring severity of the pain indicates a vascular headache rather than a tension headache. Migraines are often accompanied by photophobia (hypersensitivity to light), phonophobia (hypersensitivity to sound) and nausea. ... 

backache, bruises on foot (feet), difficulty walking, pain in several joints

headache, irritability, pain in neck, tight feeling on back of neck

Tension headaches, which were renamed tension-type headaches by the International Headache Society in 1988, are the most common type of primary headaches. The pain can radiate from the neck, back, eyes, or other muscle groups in the body. Tension-type headaches account for nearly 90% of all headaches. Approximately 3% of population suffers from chronic-tension type headache. ... 

poor appetite, stomach pain, vomiting, weakness

anxiety, depression, difficulty sleeping, irritability

Post-traumatic stress disorder (PTSD) is a term for certain severe psychological consequences of exposure to, or confrontation with, stressful events that the person experiences as highly traumatic. Clinically, such events involve actual or threatened death, serious physical injury, or a threat to physical and/or psychological integrity, to a degree that usual psychological defenses are incapable of coping with the impact. It is occasionally called post-traumatic stress reaction to emphasize that it is a result of traumatic experience rather than a manifestation of a pre-existing psychological condition. The presence of a PTSD response is influenced by the intensity of the experience, its duration, and the individual person involved. ... 

lower abdominal pain, redness around anus, stomach pain, stomach swelling

Constipation or irregularity, is a condition of the digestive system where a person (or animal) experiences hard feces that are difficult to eliminate; it may be extremely painful, and in severe cases (fecal impaction) lead to symptoms of bowel obstruction. Obstipation refers to severe constipation. Causes of constipation may be dietary, hormonal, a side effect of medications, an illness or disorder, and anatomical. Treatment is with a change in dietary and exercise habits. 

decreased sexual desire in males, difficulty sleeping, poor appetite, weakness

In everyday language depression refers to any downturn in mood, which may be relatively transitory and perhaps due to something trivial. This is differentiated from Clinical depression which is marked by symptoms that last two weeks or more and are so severe that they interfere with daily living. ...