what are its signs ?
There is usually a slow onset of a tender red area along the superficial veins on the skin.
Phlebitis
There is usually a slow onset of a tender red area along the superficial veins on the skin. 
name a us president that ends with son Lyndon Johnson. was richard nixon also the president ? Yes, the 37th president of the United States. what education qualification does he hold He graduated from Duke University School of Law. was he ever in the military service ? Yes, as a lieutenant junior grade in the U.S Naval Reserve. did he resign as the president  ? Yes, in light of his loss of political support and the near-certainty that he would be impeached and removed from office, Nixon resigned the presidency on August 9, 1974. talk a little about his illness ? In October 1974, Nixon fell ill with phlebitis. what is this disease ? It is the inflammation of a vein.
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Phlebitis [SEP] Signs and symptoms
There is usually a slow onset of a tender red area along the superficial veins on the skin. A long, thin red area may be seen as the inflammation follows a superficial vein. This area may feel hard, warm, and tender. The skin around the vein may be itchy and swollen. The area may begin to throb or burn. Symptoms may be worse when the leg is lowered, especially when first getting out of bed in the morning. A low-grade fever may occur. Sometimes phlebitis may occur where a peripheral intravenous line was started. The surrounding area may be sore and tender along the vein.