If the bumps are similar to mosquito bites, they may be caused by mosquito bites or contact with something unclean, or they may be caused by eczema. If it is eczema, the patient will need to observe the symptoms for a while, depending on the actual symptoms, and it may disappear on its own in a few days. If there is an aggravation, then the patient should visit the dermatology department of the hospital for an interview and be treated with medication under the guidance of the doctor, as self-medication may lead to an increase in symptoms.