Does drinking barley tea at night cause insomnia?

Drinking barley tea at night does not necessarily cause insomnia. Barley tea contains no substances that affect sleep. However, drinking too much at one time—especially at night—may increase nighttime urination, which could potentially disrupt sleep and even lead to insomnia. Insomnia is often related to mental stress and nervous tension. Drinking a glass of milk before bedtime may help calm the mind and promote sleep. Additionally, listening to soothing music can help relieve tension and anxiety.