Wet cough for 15days. During nit sleep.

Kindly note carefully what triggers him... It can be the known weather change without (or with travel prior to 15 days)... - Or change of environment for instance...  - Also to see the triggers other than the same too... - As you have pointed out the possibility of a dust allergy... - Most of the times triggers can be within home too (Especially the lockdown being enforced now)... - To check if any home based dusting or use of more of detergent for his clothes or change of the detergent recently like 15 days back or so ... Like New clothes, presence of a pet(s)and over zealous attachment to the pet(s)... - Use of particular contents in various packaged OR few newly made home based food items themselves OR items which are within the reach of your child and maybe you have missed seeing him go near it or consume it!!! - It can be home based small garden pollens or nearby garden releasing with the winds blowing in your home's directions too!!! - Or house cockroaches or spiders etc... - Kindly make sure you keep these points into consideration. - Essentially the final treatment for a definitively unanswered but a certain allergic triggered cough, is always KNOWING THE ALLERGENS for parents by being a very KEEN OBSERVER through out the day (I am sure you are doing your best to understand them but my above additional allergen list may help you adding them as part of your list) and PREVENTING them from the same... - Also consider the possibility of Hand Rub or a New Soap allergy with Corona scare making everyone of us use this more often than ever... - Basic rules for allergic kids are ---> ---> Rule no (1) Is to MAINTAIN ALLERGEN DIARY for your kid... ---> Rule no (2) Write down OLD and NEW allergens that You already know (eg - For dust try to find the specific area where  the dust triggers his allergic response) and those which are specific to his encounters of certain areas within home and outside... --->Rule no (3) Use indirect steam (Parent and child being inside the cover of a towel and ---> keep the steam machine or steam other source inside the towel ---> let the steam hit the body of the Parent first and then hit the child ---> this ensures the safety because of direct heat related effects for the softer skin of children) - Use steam 2 to 3 times a day just to be sure cold has not been the only trigger OR dryness of nasal passages OR throat must not be the reason for the cough or in your case the presence of Wet cough might suggest that more likely it is an allergic response triggered with an allergen exposure + maybe already a dry throat or nasal passages ---> leading to allergic response and hence more watery discharge and hence post-nasal drip when inclined triggering the Clough for him... - Or plain wheezing response with change in sound and a typical whistling sound (Wheezing) when having such cough episodes... ---> Rule no (4) Most kids or adults may face allergic triggers early morning or when they face the triggers during day times... To find these is always the key and NOTING THEM AND AVOIDING them is the MOST IMP STEP... ---> Rule no (5) Kindly consult via Telemedicine platform for a Definitive change in medicines or to differentiate your child's symptoms and figuring out allergens and getting treated accordingly... ---> As this is the most commonly encountered issue with children across the World especially in Urban areas it is a difficult task to figure out the triggers, although it might get tricky at times when the environmental triggers and many others may get easily unnoticed and unaccounted for... ---> Hope this helps... ---> Do Consult for any further assistance with medication changes or additions... Thanking you, Dr Akshay Jadhav MD Pediatrics...