What are the symptoms of common infective conjunctivitis?

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One eye may be infected, but it usually spreads to both eyes. The 'whites' of the eyes look inflamed, and red or pink.
The eyes may feel gritty and water more than usual.
Some mild soreness may develop, but it is not usually very painful.
The eyelids may become swollen, and are often stuck together with gluey material ('discharge') after a sleep.
Vision is not normally affected. You may get some blurring of vision due to discharge at the front of the eye. However, this clears with blinking.

What is the treatment for common infective conjunctivitis?

Not treating is an option for mild infections. The tears contain chemicals that fight off bacteria. Many infections clear on their own within 2-5 days without treatment. If symptoms get worse then see a doctor to check your eye and to see if you need treatment.
Bathing the eyes with cool clean water may be soothing.
Antibiotic eye drops or ointment are often prescribed. Antibiotics do not kill viruses. However, it can be difficult to tell the difference between viral and bacterial conjunctivitis. An antibiotic will clear bacteria, and prevent secondary bacterial infection of a viral conjunctivitis. (Tell your doctor if you are pregnant as some eye drops may not be suitable.)

Do not wear contact lenses until symptoms have completely gone, and for 24 hours after the last dose of any eye drops or ointment.
Infective conjunctivitis is contagious. The likelihood of passing it on is not high unless you are in close contact with others. However, until the infection has gone, to help to prevent passing it on:
Wash your hands regularly, particularly after touching your eyes.
Do not share towels, pillows or utensils.