recordplay

After a fair bit of rainfall this damp/wet patch keeps appearing in my cellar. It looks like the previous owner has cemented there, so not sure if its an issue that has been there before. Nothing came up on the house survey when I bought the house. Any advice on what to do with it. It drys up after a few days and it definetly doesn't appear to be dripping from above as I can't feel any wet areas above. Seems to be coming from below, and like I said mainly when we have heavy rainfall. Really hard to check the surrounding rooms as its right below in the cellar so you cant access anything beyond the breezeblocks or concrete floor. Was thinking of painting over the floor with garage floor paint. Is that a good idea? or should I do any other treatment first?