Folliculitis can cause swollen lymph nodes. Folliculitis is a purulent inflammatory skin disease caused by Staphylococcus aureus and Streptococcus epidermidis infection of hair follicles and the tissue surrounding the follicles. If it occurs on the head and face, it can cause swollen lymph nodes at the back of the neck in severe cases. If it occurs on the buttocks or thighs, it can cause swollen lymph nodes in the groin area. The main treatment is anti-infection, you can use topical anti-infection creams, such as fusidic acid cream, clindamycin phosphate gel, compound polymyxin B cream. If the condition is more serious, it can be combined with oral antibiotic drugs, such as roxithromycin capsules and amoxicillin capsules, but the specific diagnosis and treatment should be carried out under the guidance of a clinician.