Low haemoglobin after a procedure can happen if there was some blood loss or due to temporary effects on your body. It may not always be directly related, so it is important to confirm with a blood test and review your reports. Focus on an iron-rich diet, such as green leafy vegetables, dates, and legumes, along with good hydration. Your doctor may suggest iron supplements if needed. If you feel very weak or if your levels remain low, consult a doctor for proper treatment.