ALP is short for serum alkaline phosphatase. One of the most common causes for a raised level in the blood is a bone condition such as rickets. Your son is very unlikely to have rickets as it is very rare these days. Other causes of raised ALP levels are indeed liver conditions. However, a very common finding is a transient or very temporary raised ALP in young children which is completely benign and the ALP level drops back to normal levels after a few months. So it is common to adopt a 'wait and see' approach when a young child has a raised ALP level as this may just be a very temporary finding which soon goes away. Your son must be under the care of a paediatrician.
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