Shivering or trembling in the fingers can occur for many reasons, including inherited tremors, stress, anxiety, fatigue, excess caffeine intake, thyroid problems, nerve conditions, low blood sugar, or side effects of certain medicines. Since your father also had similar symptoms, a familial or hereditary tremor may be possible. In many people, the shaking becomes more noticeable while holding objects, writing, eating, or during stress and tiredness. The exact cause depends on whether the tremor happens at rest or during movement and whether other symptoms such as weakness, stiffness, poor balance, or numbness are also present. Some mild inherited tremors remain stable for years, while others may slowly increase with age. Reducing excess tea, coffee, smoking, stress, and lack of sleep may help reduce trembling in some people. Doctors may sometimes recommend thyroid testing, vitamin checks, nerve examination, or medicines that help control tremors if daily activities are being affected. Sudden worsening of tremors, speech problems, difficulty walking, or whole-body shaking should be carefully evaluated, as they may require a more detailed neurological assessment.