Question: In the last couple of months, I have experienced a chronic headache in my forehead and after checking with doctors etc nothing could be found. I then kind of had the intuition it could be related to my meditation practice. It's more the 2 years I meditate daily for 20/30 minutes or more. I have come around some articles online reading that focusing on the breath (especially in the nostrils, which I used to do) could lead to an accumulation of energy around the third eye chakra, and it seemed to me my pain felt exactly like this. I have now taken a break from my daily practice and the headache got much better and nearly disappeared, but as I stopped meditating I really miss the peaceful state of mind and presence I had when I meditated daily, so I would like to start again soon. I would be so grateful to get tips from you on this.

Answer: 
The Buddha did not teach to observe breathing at the nose tip. The Buddha taught to simply let go and give up craving. Just sit quietly and naturally. The mind should be "open" rather than "focused".
Could you tell me what is your object of focus?
Have you been concentrating on, for example, the space between your nose and your mouth?

If that's the case, I would recommend that you choose a different region of the body. Lower abdominal area, about three fingers below your naval, would be an option. Some Chinese masters believe that women should concentrate instead on the big toes or the bottom of the feet.

In any case, I think pushing the focus on the lower parts of the body will help. If this doesn't help, you should go talk to an experienced meditator.