Patients with red bumps on the scalp that are itchy and do not stay well for a long time and have a tendency to gradually enlarge the lesion area are a very common phenomenon, presumably related to seborrhoeic dermatitis, eczema and folliculitis. However, it is worth noting that the causes of these three conditions are very complex and are influenced by many different factors, requiring targeted treatment. If the wrong treatment medication is used, it can lead to prolonged and aggravated conditions.