"headaches" in the noun sense
1. concern, worry, headache, vexation
something or someone that causes anxiety a source of unhappiness
"New York traffic is a constant concern"
"it's a major worry"
2. headache, head ache, cephalalgia
pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
Source: WordNet® (An amazing lexical database of English)
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