<s>[INST] My son 20 month old wake up from sleep with frontal swelling above left eye side. Later it reduce in size. Then the swelling starts to spread around 2-3 cm in size. When I press hard he didn t cry. He didn t show any other symptoms. He didn t fall or hit himself recently. What could be the reason. [/INST] Hi Dear, Welcome to Chat Doctor. Understanding your concern. As per your query you have frontal swelling. Well there can be many reasons for symptoms you mention in query like sinusitis. There can be other problem also like hematoma or inflammation from any kind of injury. I would suggest you to apply warm compresses gently and consult pediatrician for proper examination. Doctor may examine physically to check tenderness and consistency. Doctor may also order CT scan or X-ray to confirm the diagnosis. Doctor may prescribe antibiotics like amoxicillin at least for 5 days, analgesic along with anti-inflammatory or may Chat Doctor.  Hope your concern has been resolved. Get Well Soon. Best Wishes, </s>