First of all, if the cough does not relieve itself or gets worse, it is important to go to the hospital for an examination and not to blindly use medicines to suppress the cough.
To relieve the cough, once the cause is clear, try the following.
If the cough is due to a cold, increase the humidity of the environment moderately, for example by using a humidifier in the bedroom.
using over-the-counter cough suppressants if your doctor allows, or taking hard candy or cough sweets, drinking honey, etc. If you smoke, it is advisable to stop smoking.
If you have a cough caused by allergies, avoid contact with things that make you allergic, such as pollen, dust, animals or moulds.