Drowsiness, or sleepiness, is a state of feeling unusually tired and having a strong desire to sleep. It can occur due to various factors, including lack of sleep, long periods of inactivity, or certain medical conditions. Drowsiness can affect a person's ability to concentrate and perform tasks effectively. Common causes of drowsiness include poor sleep quality, sleep disorders like sleep apnea, and the use of certain medications. It is important to address drowsiness, as it can lead to accidents, decreased productivity, and other health issues. Maintaining a regular sleep schedule and practicing good sleep hygiene can help reduce drowsiness.