Brief Answer: Not worrisome. Detailed Answer: Hello, Thanks for posting your query. The headache that you had after exercising could be due to dehydration hypoglycemia or due to the after effects of congestion caused by the viral infection. This is usually self limiting and subsides after taking a mild pain killer like acetaminophen. You can avoid getting it by taking few simple measures - 1. Dehydration or electrolyte imbalance - Regular intake of rejuvenating fluids during exercise might help. Apart from the sports drinks which contain glucose and electrolytes you must have enough water alongwith to combat dehydration. 2. Low blood sugar - Taking a light breakfast, preferably some lean protein and/or complex carbohydrate with a little healthy fat-- before the exercise or immediately after the exercise might help you. 3, Low blood pressure can also be the reason - Breathe deeply after the exercise. In case the symptoms are persistent consider getting yourself evaluated by your physician. I hope this answers your query. In case you have additional questions or doubts, you can forward them to me, and I shall be glad to help you out. Wishing you good health. Regards. Dr. Praveen Tayal. For future query, you can directly approach me through my profile URL http://bit.ly/Dr-Praveen-Tayal

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