Yes, low Vitamin D and low iron (anaemia) can be related to long-term headaches. Iron deficiency can reduce oxygen supply to the brain and body, leading to tiredness, weakness, and frequent or dull headaches. Low Vitamin D levels may also contribute to muscle pain, low mood, and headache in some people. Since your MRI and EEG are normal, serious brain causes are less likely, and nutritional deficiencies or lifestyle factors may be playing a major role. Treatment should focus on correcting these deficiencies with proper supplements prescribed by a doctor, along with a balanced diet. Iron-rich foods like green leafy vegetables, pulses, beans, dates, jaggery, eggs, and meat (if you consume it) can help improve iron levels, and taking Vitamin D supplements as advised, along with safe sunlight exposure, can improve Vitamin D levels. Drinking enough water, maintaining regular sleep, reducing stress, and avoiding skipping meals can also help reduce headache frequency. Pain relievers may be used occasionally for severe episodes, but they should not be taken frequently without medical advice. If headaches continue even after correcting deficiencies, or if they become severe, one-sided, or associated with vision changes or vomiting, you should consult a doctor again for further evaluation, as other types of chronic headache may need specific treatment. With proper correction of vitamin levels and lifestyle care, many people experience significant improvement in long-standing headaches.