When skin feels tight after a shower, part of the hydrolipid film that covers it has been washed away. This sensation is a common cosmetic sign, linked to water, temperature and cleansing agents.
It is frequent. It deserves to be understood, because it tells us how the skin experiences washing.
The hydrolipid film in brief
The surface of the skin is covered by a thin film. It combines an oily phase, from sebum and the lipids of the stratum corneum, and an aqueous phase, from sweat and skin water.
Just below, the stratum corneum retains water thanks to two elements. The lipids arranged between its cells form a barrier that slows evaporation. The cells themselves contain a set of small water-soluble molecules called the “natural moisturising factor” (Rawlings and Harding, 2004).
What the shower washes away
Cleansing agents are designed to remove fats. They do not distinguish between dirt and the skin's useful lipids. Depending on their nature, they may also interact with the proteins of the stratum corneum.
A review devoted to cleansers describes this clearly. The most aggressive surfactants damage the skin's proteins and lipids, resulting in a feeling of tightness after washing, dryness or even irritation (Ananthapadmanabhan et al., 2004). Mild surfactants interact far less with these constituents.
Hot water amplifies this effect. In a controlled study, the same cleansing solution applied at 40 °C altered the skin barrier more than the same solution at 20 °C or 4 °C (Berardesca et al., 1995).
The signs that accompany tightness
Tightness rarely occurs alone. In the minutes or hours following washing, we often observe:
- a feeling of dryness, the skin seems thirsty and calls for a care product;
- roughness to the touch, especially on the legs, arms and backs of the hands;
- a dull appearance, the surface reflects light less well;
- fine flakes, visible on dark skin or on dark clothing.
These signs describe the state of the surface. They reflect a less well-hydrated stratum corneum and a less continuous film. They vary according to the season, indoor climate, age and washing habits.
The role of pH
Washing also alters the pH of the skin surface, which is naturally acidic. Tap water and alkaline soaps raise it for several hours.
A multicentre study of 330 volunteers compared skin according to its pH. Skin with a pH below 5 showed better barrier, hydration and desquamation parameters than skin with a pH above 5 (Lambers et al., 2006). Surface pH is therefore one of the elements that accompany the feeling of comfort.
Habits that limit the effect of washing
A few simple habits reduce what the shower washes away.
- Lower the temperature. Lukewarm water stresses the barrier less than very hot water.
- Shorten the shower. Contact time with water and cleansing agent matters.
- Dose the cleansing agent. A small amount is enough, especially on areas that are not very dirty.
- Rinse carefully. Residues left on the skin prolong contact with surfactants.
- Dry by patting. A towel pressed against the skin avoids unnecessary friction.
- Apply a moisturising care product to skin that is still slightly damp, if you feel the need.
When to consult
Transient tightness after a shower is part of the ordinary experience of the skin. If the sensation persists all day, is accompanied by redness, itching or cracks, or does not subside despite gentle washing, consult a dermatologist. It is up to them to assess the condition of your skin.
This article is part of the PHYTO 5 Library.
Sources
- Ananthapadmanabhan KP, Moore DJ, Subramanyan K, Misra M, Meyer F. Cleansing without compromise: the impact of cleansers on the skin barrier and the technology of mild cleansing. Dermatologic Therapy. 2004;17(Suppl 1):16-25. DOI : 10.1111/j.1396-0296.2004.04s1002.x
- Berardesca E, Vignoli GP, Distante F, Brizzi P, Rabbiosi G. Effects of water temperature on surfactant-induced skin irritation. Contact Dermatitis. 1995;32(2):83-87. DOI : 10.1111/j.1600-0536.1995.tb00751.x
- Lambers H, Piessens S, Bloem A, Pronk H, Finkel P. Natural skin surface pH is on average below 5, which is beneficial for its resident flora. International Journal of Cosmetic Science. 2006;28(5):359-370. DOI : 10.1111/j.1467-2494.2006.00344.x
- Rawlings AV, Harding CR. Moisturization and skin barrier function. Dermatologic Therapy. 2004;17(Suppl 1):43-48. DOI : 10.1111/j.1396-0296.2004.04s1005.x