common While some people apply powder to achieve a dry, matte finish and reduce swelling, this can actually cause the powder to clump with sweat and clog pores, further exacerbating inflammation. Particular caution is required when applying powder to skin folds, as this can lead to bacterial growth in the affected area. Please note that itching or inflammation can be relieved by applying steroid ointment or taking oral medication.
In addition, some people wash with salt water because they hear it is beneficial, but this also damages the skin. It is also best to avoid creams and lotions, as oils such as petroleum jelly and mineral oil can clog pores and worsen heat rash.
Source: Woman Beauty