A female who has a height of 5'5 should weigh between 114 lbs to 149 lbs.
114 lbs to 149 lbs is the average healthy weight for a 5,5 female.
If the 5,5 in height female weighs more than 150 lbs and weighs between 180 lbs to 234 lbs then they are overweight.
Being underweight is usually worse than being overweight and if you're underweight it could cause other health issues.
Or you could have health issues causing you to be underweight and you will need to try and gain back some weight to your healthy weight.
The weight for a female depends on the height and age of the female.
For a 5,4 female the weight should be between 110 lbs to 144 lbs.
For a 5,5 female the weight should be between 114 lbs to 149 lbs.
For a 5,6 female the weight should be between 118 to 154 lbs.
For a 5,7 female the weight should be between 121 to 158 lbs.
For a 5 ft tall female the weight is also between 121 to 158 lbs.