Hi @gerdboss occasional headaches can occur during straining such as sneezing or carrying something heavy, this is sometimes referred to as primary cough headache. However, these should be infrequent, isolated and mild headaches that do not extend for a prolonged period. If you notice the headaches are becoming more frequent/prolonged, or accompanied by other symptoms such as lightheadedness, giddiness, visual disturbances or weakness/numbness - then you would need to get it checked with your doctor! They would check your blood pressure, as well as examine your eyes and nerves for any evidence of raised intracranial pressure (ICP). Hope this helps!