There are two general conditions in which the eyes are congested but not painful: in the first case, it may be due to eye fatigue or dry eyes, resulting in compensatory conjunctival congestion, due to insufficient secretion of tears or poor quality, or even excessive eye use at close range can lead to fatigue and dry eyes. The congestion caused by these conditions is usually mild and can usually subside within a short period of time with medication or increased rest. The second condition, vesicular conjunctivitis or superficial scleritis, are both cases of conjunctival congestion caused by immune factors, and the congestion is often limited, concentrated in a certain direction such as on the outside of the white of the eye, with a fan-shaped distribution of congestion. It is usually caused by a decrease in the body’s resistance, such as fatigue or a decrease in immunity caused by staying up late or drinking alcohol, causing an immune response that leads to congestion. Anti-inflammatory or hormonal drops can be used, and will often subside after 1-2 weeks.