The first thing you need to do is to drink plenty of fluids and take rest, and the second thing you can do is to have a nasal rinse. Although colds are caused by viral infections, antiviral treatment is not usually given. Colds are self-limiting illnesses and usually heal on their own. If the nasal mucus is caused by a cold, it can be cured by drinking plenty of water to speed up metabolism and resting to promote immune recovery. Secondly, if the nasal cavity is uncomfortable due to snot clumps, you can use saline to rinse. Not only can relieve the nasal secretion more performance, at the same time can reduce nasal congestion. However, this operation is more specialized, it is recommended to consult a professional doctor to complete the operation.