Armpit tingling that hurts like pins and needles may be related to causes such as herpes zoster, folliculitis, and polyneuritis. 1. Herpes zoster: caused by infection with varicella zoster virus, which can lead to burning sensation, itching, tingling or numbness in the area around the affected nerve. 2. Folliculitis: caused by damage to hair follicles secondary to bacterial infection and other pathogens, often manifested as pimples centered on hair follicles, accompanied by tingling sensation. 3. Polyneuritis: polyneuritis caused by trauma, diabetes and other factors, can appear sensory impairment, early sensory abnormalities such as pins and needles, ants, burning and other irritation symptoms. It is recommended that people with underarm tingling like pins and needles go to the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.