Toddler’s skin was crawled by the bugs red and swollen blisters, may be the emergence of allergic reactions, can be used topical or oral medication. Young children’s skin is relatively delicate, after being crawled by the bugs are easy to allergy or irritation inflammation, redness, swelling, blisters, at this time to avoid the affected children to scratch the affected area, to avoid causing local infections, and try not to use raw water to rinse the affected area. You can use povidone-iodine to sterilize the area, and if the itching is severe, you can also apply glycerine lotion or take anti-allergy drugs such as loratadine orally as prescribed by the doctor. If the redness and swelling is very serious, and the toddler cries more seriously, fever and so on. Should promptly seek medical attention, follow the doctor’s instructions for further examination, under the guidance of the doctor for targeted treatment or treatment, specific medication should follow the doctor’s instructions.