I don't know if the kitten was screaming, uneasy, scared, or hungry. To ease the discomfort of kittens, I have several ways to share. 
First, create a quiet, warm environment where your kitten is at ease and comfortable. Put your kitten in an undisturbed, warm and pleasant room and use blankets, stuffed animals, etc. to increase its sense of security. 
Secondly, the kitten's diet should be ensured. Maybe you're hungry, or you're thirsty, so you're screaming constantly. Provide them with plenty of food and water, and feed them some cat food or cat milk powder to meet their dietary needs. In addition, give the kitten proper attention and companionship. Kittens need human love and companionship. You can play with them and make them feel cared for with a gentle touch. This helps to ease their uneasiness and fear. 
Finally, if the kitten's barking is constant, it may be sick or injured. To make sure they're in good health, take them to the veterinarian as soon as possible. 
In short, don't be in a hurry if the kitten you pick up keeps barking. Taking appropriate measures, such as providing a quiet, warm environment, giving proper diet and attention, and seeking the help of a veterinarian, can help ease their discomfort.