Potato chips have some decongestive effect, but this decongestive effect is very limited. As potato chips mainly contain more starch, there are some oozing potato liquid, these have a certain degree of anti-inflammatory effect or swelling effect. Potato flakes also contain potassium ions, cut into thin slices on the swelling, can be through the high potassium osmotic gradient absorption of excess water, and then play a role in reducing swelling. Clinically, it is commonly used in the infusion site due to needle puncture blood vessels, resulting in fluid extravasation and the formation of infusion site mild swelling, the specific efficacy varies from person to person. Note that mild swelling can be reduced by using potato tablets, and it is best to use them within 48 hours of the onset of swelling, while avoiding infection. If there are various other causes of severe swelling, potato chips may not be very effective in reducing swelling, and the patient should seek timely medical treatment to avoid delay in treatment.