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Print: - How do I know whether a virus, bacteria or allergen is causing my symptoms?
- Is my condition contagious?
- Will an antihistamine help relieve my symptoms? If so, which antihistamine should I take and for how long?
- Will eye drops help relieve my symptoms? If so, how long should I use them?
- Will conjunctivitis damage my eyesight?
Written by familydoctor.org editorial staff
Reviewed/Updated: 07/10
Created: 09/00
