Mild headaches that occur when you delay or skip tea or coffee are often due to caffeine withdrawal or routine-related tension, and they are usually not dangerous. In such cases, simple measures like drinking water, having your usual small amount of tea or coffee, resting, or taking a short break are often enough, and if needed, a simple pain reliever like paracetamol is the safest option. Medicines like Diclogem (diclofenac combination) or Disprin (aspirin) are generally not required for these mild, predictable headaches and should not be used frequently, as they can cause side effects like stomach irritation or acidity. If the headaches become frequent, severe, or start occurring without relation to caffeine intake, it is better to consult a doctor to rule out other causes.