A hot bath for a cold has no significant effect, because a cold is caused by a bacterial or viral infection and the main symptoms are headache, runny nose or fever. You should actively use anti-cold medication, such as cold and fever pellets. If you have a fever and cough, you should use antipyretic drugs and cough medicines, such as carboxymethystane oral liquid and snake bile and Sichuan shellfish liquid. During the treatment period, you should pay attention to drink more water, at least 2000-3000ml of water per day. You can also eat more vegetables and fruits, such as apples, bananas, cabbage, cabbage, etc. These foods are rich in water to replenish water, and vitamin C supplementation has a positive effect on anti-cold.