Why pH matters!

Can overuse of sanitary pads and pantyliners change vaginal pH?

- Dr Gandhali Deorukhkar

The vagina is a self-regulating ecosystem designed to stay healthy through a precise balance of bacteria, moisture levels and acidity.

A normal vaginal pH of 3.8 to 4.5 helps maintain this balance by supporting good bacteria (lactobacilli) and preventing harmful microbes from growing.

But doctors now warn that a common modern habit—the daily overuse of sanitary pads and pantyliners—may be quietly disturbing this delicate environment. While these products are essential during menstruation, using them excessively or incorrectly can create conditions that alter vaginal pH, leading to discomfort and infections.

Why Vaginal pH Matters

Before understanding the impact of pads and liners, it's important to recognise why pH plays such a crucial role. A healthy vaginal pH:

• Prevents bad bacteria and yeast from multiplying

• Reduces the risk of bacterial vaginosis and yeast infections

• Maintains comfortable moisture levels

• Supports natural self-cleaning mechanisms

When pH rises (becomes more alkaline), women may experience unusual discharge, itching, odour or burning. Even small lifestyle changes can shift this balance—including prolonged pad use.

How they can disrupt pH

Constant moisture: Pads and pantyliners are designed to absorb moisture, but when worn for long hours—especially on non-period days—they create a warm, damp environment around the vulva.