Some problem in nose, specially left nostril

Hi there, voice.

Sure it can be sinus. I presume you mean frontal sinus area, not occipital which is nerve-related.

Allergies, infection, a cold - all can cause nasty thick mucus that can block the sinuses and give you a headache. I have chronic infection in one maxillary sinus, shows up on imaging.

Dryness can cause thickened mucus, making it hard for the cilia to remove bacteria, etc. I use generic 12-hour Mucinex to thin the mucus, also a good saline sinus wash with the squeeze-bottle, not just pouring saline through, not just a spray. A dab of AYR around the nostrils at night stops the "crusties."

Dried up mucus is annoying, as you have seen. It's also not normal. If the inside of the nose is dry, the bacteria removing system can't work. My nose gets itchy and I get sinus headaches.

My humidifier is on the fritz, so I'll be taking a Mucinex tonight to try to avoid my every morning headache. I'll also do a sinus wash to rinse out the dried up gunk. I may also do a quick spritz of a spray designed for dry or irritated sinuses. I will NOT use an antihistamine because they dry up the mucus even more.

Check your medicines. A lot of them dry up sinuses also. If you can avoid taking them at bedtime it may help. I don't find drinking more helps. It just gets me up in the middle of the night to use the bathroom.

If you can't correct this situation on your own you should see an ENT.