Twitching, or spasm, refers to involuntary muscle contractions that can occur in various parts of the body. These contractions can be brief and may happen due to factors like stress, fatigue, or dehydration. Common areas affected include the eyelids, arms, and legs. While most twitches are harmless and temporary, persistent spasms may indicate an underlying medical condition. Conditions such as muscle strain, nervous system disorders, or electrolyte imbalances can contribute to more severe twitching. If spasms are frequent or painful, consulting a healthcare professional is advisable for proper evaluation and treatment.