If the bumps in the armpit area are mainly erythematous and appear symmetrically on both sides, it is possible that the bumps are eczema-like dermatitis. If the bumps are unilaterally arranged and accompanied by obvious burning and pain, and clear small blisters can be seen, it is possible that the bumps are herpes zoster, which is related to viral infection. It is recommended to take oral famciclovir and use topical acyclovir cream. 3. If the bumps on both sides of the armpit area are accompanied by mild vesicles and oozing, it is considered possible that it is related to the inter-rubbing rash caused by long-term sweating and repeated friction, and it is recommended that saline wet compresses be applied.