I'm 27, and for as long as I can remember I've had problems with my sinuses, ear infections, colds, itchy burning mouth, running nose, itchy ears. Am I allergic to something ?

Symptoms are your body's way of telling you things are not right, so it is important you act to improve your health. Allergic reactions have a variety of triggers, but all indicate weak and stressed immune and digestive systems. There are many ways of identifying allergies - the BioEnergetic Stress Testing system is non-invasive, painless, fast and comprehensive (contact Biotech Health, 01730 233414). A probe is applied to the skin to measure changes in electrical resistance at acupuncture points. It can test for intolerance to a range of foods and environmental allergens, the health of the main organs, immune function and vitamin status - and suggest appropriate remedies.

I have suffered from an itchy, flaky scalp and dandruff all my life. Have you got any ideas?

An itchy, flaky scalp can be due to poor diet, allergy, stress, harsh chemicals and detergents in shampoos, excessive perspiration and hormone imbalances. Follow a nutritious diet that is low in saturated fats, refined foods and sugar. Dandruff is linked to deficiencies of B vitamins, essential fatty acids and selenium, so eat lots of fruit and vegetables (avocados and bananas), oily fish, seeds (sesame), nuts (brazil), nut oils and olive oil. Massage cold-pressed linseed oil into the scalp and leave overnight, then wash off with a gentle, chemical-free shampoo such as Barefoot Botanicals SOS Hair and Scalp Rescue Shampoo (0870 220 2273).

· Emma Mitchell is a natural health therapist. Before following Emma's recommendations, you should consult your GP about any medical problems or special health conditions.

Send your questions to Wellbeing, Guardian Weekend, 119 Farringdon Road, London EC1R 3ER. Email: ask.emma@theguardian.com.