Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand.. As per your complain sinus pressure can be due to sinus infection which is commonly due to bacterial infection in the sinuses while can also be secondary to viral cold and cough.. Clogging in ears and feeling of fluid inside the ears seems to be due to ear infection secondary to sinus infection.. White coating on tongue can be due to yeast infection causing thrush and is probably due to reduced resistance as you have other infections.. The rashes can be due to either fungal infection but chances are less and more probably be due to some allergic reaction.. I would however suggest you to consult an Otolaryngologist and get evaluated and he can advise you to get a PNS VIEW x ray done to rule out for problem in the sinuses as well as do an otoscopic examination to look for ear infection.. Thrush can be diagnosed with its typical appearance of cheesy white patches.. In case of infection in sinuses and ear you can be advised to take antibiotics oral as well as ear drops, anti-inflammatory painkiller like Ibuprofen. saline nasal irrigation, steam inhalation and decongestants like phenylephrine oral as well as nasal drops.. For thrush antifungal mouthwash like Nystatin and antifungal lozenges will help.. Take ample of probiotics like Yoghurt and garlic.. For rashes taking anti allergics like Benadryl and applying steroid ointment will help.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.