What should you know about red spots on arms?

Spots on the upper arms may feel rough and sit around hair follicles, while isolated itchy marks may follow an insect bite or contact with a plant. Shaving, sweat, tight sleeves, and fragranced products can inflame follicles. Acne can affect the arms or nearby areas, and hormonal acne may follow a recurring pattern. Perioral dermatitis is defined by a different distribution, so location matters. Record whether the spots are flat or raised, itchy or painful, scaly, filled with fluid, or present on both arms.

Use a mild, fragrance-free cleanser, moisturise after washing, and avoid hot water, rough exfoliation, and picking. Wear loose sleeves after sweating and wash clothing that may hold detergent or product residue. Stop a new cosmetic or topical product if it burns or worsens the rash. If shaving triggers bumps, pause until the skin recovers. A dermatologist can distinguish Acne, Folliculitis, irritation, and other causes before recommending medicine or LED Light Therapy.

Arrange a review if the spots last, spread, leave sores, or repeatedly return despite removing likely triggers. Seek urgent help for rapidly spreading redness, severe pain, facial swelling, breathing difficulty, fever, purple marks, or a child who appears very unwell. A rash that follows a new medicine also deserves prompt medical advice, even if it is not painful.

Do the spots follow follicles, contact areas, or another recognisable pattern? Should I change my cleanser, moisturiser, shaving routine, or laundry product? What treatment is safe for my skin, and which changes require urgent review?