Sensitive scalp

Baby shampoo is suitable for use on sensitive scalp

FALSE - Baby shampoo is specifically developed for the immature scalps of babies. Sensitive scalp shampoos are designed to reduce scalp sensitivity in adults, and thus reduce the accompanying itching, tightness and/or pain.
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Itching can be linked to seborrheic dermatitis or psoriasis

TRUE - Itching often accompanies signs of seborrheic dermatitis (dandruff, redness) or psoriasis of the scalp (hyperkeratotic plaques).

When itching of the scalp manifests itself in an isolated manner, that is, without other clinical signs such as dandruff or red plaques, it is considered to be sensitive scalp.
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A person can have sensitive scalp without any visible abnormality whatsoever

TRUE - This reflects the very definition of sensitive scalp. People can experience itching, tingling, tightness, burning sensations and/or pain with no related visible sign on the scalp (such as dandruff, redness, plaques, etc.)