I write now here because im looking for solutions and what im telling might help other people already aswell. Im not from an english speaking country so my english might not be perfect. So i have since september 2019 a chronic sinusitis. Well, first it was an acute sinusitis that turned into chronic. They made a MRI, DVT, and then a CT a year later. At first it was just in the Ethmoidalis, then it gone into the sinus maxillaris. So what my ENT did of course was prescribing me nosespray, then i had antibiotic called Amoxicillin. That antibiotic helped at first to 99% but due to too short prescription of 10 days when i had the sinusitis already 8 months, it came back a week later, when i was finish with the antibiotic. Then they tried it with Clindamycin for a week, Clarithromycin for 3.5 months, Penicillin for 5 days, and Amoxicillin again for a week. Nothing helped, olthough the Clarithromycin helped at least a bit. The Amoxicillin didnt help at all anymore. Which let me think, ok that seems to be now an antibiotic resistant bacteria. What else i have done is, i inhaled with different solutions, inhaling seemed to help a bit at least, but not to fix it. I took Sinupret helped a bit, Bromelain helped a bit, Soledum made it worse, nosespray with cortison made it worse, saltwater and camilla made it better. The nose is free the CT shows a chronical infection of the ethmoidalis and sinus maxillaris. I have also symptoms on my ears of a loud noise sometimes and almost cant hear then for 1-2 minutes, its a bit better with antibiotics. Sometimes a swollen eye. Before this, i never had sinus infections at all. It doesnt go away since this i suffer under it every day. Angocin was so far the most helpful its a natural antibiotic, which means it kills bacterias, aswell as funguses and viruses. The problem that i see in general by chronic sinusitis is, of course there are some great medicaments out there that theoretically kill those bacterias and even MRSA bacterias still, BUT the problem is, we cant reach them. A surgeon can reach them. But i myself cant reach them, i can flush my nose and use a nosespray but thats about it, Inhaling, nose flushings etc seems to only help by the issues in the beginning of the nose, that at least there is nothing plugged up and has a better ventilation, but nobody reaches into the sinus maxillaris or ethmoidalis or any other sinuses. Its like a reservoir for bacterias. Its hollow rooms in the skull and it feels like a reservoir for bacterias cause even if nose is free and i dont have sniff it hurts still in the cheeks, under the eye sometimes, and on the forehead and in the ears. Theoretically also for funguses or viruses. But usually its bacterias. The immunsystem cant reach it, and also the antibiotics almost dont reach it. Cause there are no bloodvessels going in there its just filled with a shift of membranes that transport out intruders. So its no wonder a chronic sinusitis is such a drama. And makes tired. Because the bacteria spills from those chambers they live in, in the rest of the body over the throat and the immunsystem is busy constantly fighting this. With fever too. So of course we are all time feeling weak, and tired, and its hard to manage life with this when it goes so long time. I felt on a few single weeks good and i was happy and driving around with bycicle having fun in my life again, until it came back worse. A surgery have i not had due to corona i was always sent away by the hospitals. Im from germany over here they suspended all surgeries that werent really that important to keep someone alive to have space for corona infected, or better said to receive the government payment if they keep beds free as much as possible. So then i did a research what bacterias most likely cause a chronic sinusitis. Of course its bacterias that are antibiotic resistant, like staphyloccocus aurea for example. And there are theoretically antibiotics that still kill them. Doxycyclin for example, taken for 6 weeks. My doc refused it to prescribe it and gave me amoxicillin again which didnt help me anymore, and by the third try also not. So this could be a way you people out there could try out. But since always just a tiny part of an antibiotic reaches the sinuses it must be taken for at least 6 weeks. The docs prescribe it way too short. In an acute case that might be enough but not when i had it already months. Another thing that i figured out then is that the castanea sativa leaves extract hinders those bacterias from building toxins and to reproduce so the membranes would finally manage to transport it out. If they cant reproduce all the time. Since this is not to buy in any extract, only homeopathic which basically doesnt include anything anymore cause its so thinned, i bought now for 16€ a little tree of it and then i will cook a tea out of the leaves and drink it dayli and hope that a bit of it will reach the sinuses, i will inject it in my nose and i will inhale it. If this will reach the sinuses is another question. Thats more like a trial and error out of desperation, because the docs dont even know what is causing the infection. They see it on the MRI and CT. Which bacteria, or if its even a bacteria do they not know. And i guess thats by the majority of people the problem. Chronic sinusitis is diagnosed but nobody knows why they have a chronic sinusitis, which intruder is causing it. They tried to filter it out by a bloodtest and didnt find anything. And they wont, cause its a local infection and as long as my body keeps it from spreading, it wont be found in the blood. I dont know why they cant make a smeartest in the nose/throat, similar to a corona test but at least they are not doing that even though i asked if this would be possible. They say no, isnt possible and prescribed another antibiotic. The inflammation results are high in my blood though. Like neutrophiles etc. So my immunsystem fights it. So, i will start now trial and errors on myself and if i find something i will message the results. But the Doxycyclin could help you guys. So speak to your doc, cause it needs a prescription since its an antibiotic. I try to speak to another doc that will prescribe me it cause im tired of their fiddling around. A chronic sinus infection does anyways not go away with a week of amoxicillin, idk what they did in their medicine study but it seems like they know less than me...cause they start googling what i say and see im right. Yea its always a great sign when the doc starts useing google about what i say.