What should I do about heat rash on my face?

During hot weather, people often develop prickly heat (miliaria) due to delayed or inadequate sweat evaporation. While it is commonly believed that children are more prone to prickly heat, adults may also develop it on the face. So, what should one do if prickly heat appears on the face?

What to Do for Prickly Heat on the Face

Facial prickly heat is a common, superficial inflammatory skin condition occurring in hot, humid environments. Under such conditions, excessive sweat fails to evaporate efficiently, causing the stratum corneum to swell and become more permeable. This leads to narrowing and obstruction of the sweat ducts, resulting in sweat retention and subsequent leakage into surrounding tissues—manifesting as papules, vesicles, or pustules, which may easily become wrinkled. If prickly heat develops on the face, topical application of calamine lotion or talcum powder may be used. Alternatively, herbal decoctions can be prepared and applied externally for cleansing. For pronounced pruritus, oral antihistamines—such as olopatadine hydrochloride tablets or levocetirizine hydrochloride tablets—may be taken under a physician’s guidance.

After developing prickly heat, maintaining good personal hygiene—especially frequent facial cleansing—is essential. Typically, washing the face three to four times daily is recommended. If sweating is heavy or dust accumulates on the face, sweat should be wiped away and the face washed immediately after each episode—avoid letting sweat remain on the skin, as this may clog pores. When washing, avoid using strongly acidic or alkaline facial cleansers or soaps, and refrain from using hot water; lukewarm or cool water is preferable.

Pruritus associated with prickly heat is inevitable—particularly when body temperature rises. However, scratching should be strictly avoided. Scratching not only intensifies itching but may also damage the skin and introduce bacterial infection. Should secondary bacterial infection occur following scratching, prompt medical consultation is advised to obtain appropriate antibiotic treatment. We hope this article has been helpful. Wishing you a joyful life and good health!